diff --git a/code/__DEFINES/atmospherics/atmos_gasses.dm b/code/__DEFINES/atmospherics/atmos_gasses.dm
new file mode 100644
index 00000000000..0e290242e4a
--- /dev/null
+++ b/code/__DEFINES/atmospherics/atmos_gasses.dm
@@ -0,0 +1,21 @@
+#define GAS_N2 "n2"
+#define GAS_O2 "o2"
+#define GAS_CO2 "co2"
+#define GAS_PLASMA "plasma"
+#define GAS_N2O "n2o"
+#define GAS_NITRIUM "nitrium"
+#define GAS_BZ "bz"
+#define GAS_AIR "air"
+#define GAS_WATER_VAPOR "water_vapor"
+#define GAS_TRITIUM "tritium"
+#define GAS_HYPER_NOBLIUM "hypernoblium"
+#define GAS_PLUOXIUM "pluoxium"
+#define GAS_MIASMA "miasma"
+#define GAS_FREON "freon"
+#define GAS_HYDROGEN "hydrogen"
+#define GAS_HEALIUM "healium"
+#define GAS_PROTO_NITRATE "proto_nitrate"
+#define GAS_ZAUKER "zauker"
+#define GAS_HELIUM "helium"
+#define GAS_ANTINOBLIUM "antinoblium"
+#define GAS_HALON "halon"
diff --git a/code/__DEFINES/atmospherics/atmos_mapping_helpers.dm b/code/__DEFINES/atmospherics/atmos_mapping_helpers.dm
index 94517b21795..dd794cbf053 100644
--- a/code/__DEFINES/atmospherics/atmos_mapping_helpers.dm
+++ b/code/__DEFINES/atmospherics/atmos_mapping_helpers.dm
@@ -1,40 +1,51 @@
+///Used to define the temperature of a tile, arg is the temperature it should be at. Should always be put at the end of the atmos list.
+///This is solely to be used after compile-time.
+#define TURF_TEMPERATURE(temperature) "TEMP=[temperature]"
+
 //OPEN TURF ATMOS
 /// the default air mix that open turfs spawn
-#define OPENTURF_DEFAULT_ATMOS "o2=22;n2=82;TEMP=293.15"
-#define OPENTURF_LOW_PRESSURE "o2=14;n2=30;TEMP=293.15"
+#define OPENTURF_DEFAULT_ATMOS GAS_O2 + "=22;" + GAS_N2 + "=82;TEMP=293.15"
+/// the default low-pressure air mix used mostly for mining areas.
+#define OPENTURF_LOW_PRESSURE GAS_O2 + "=14;" + GAS_N2 + "=30;TEMP=293.15"
 /// -193,15°C telecommunications. also used for xenobiology slime killrooms
-#define TCOMMS_ATMOS "n2=100;TEMP=80"
+#define TCOMMS_ATMOS GAS_N2 + "=100;TEMP=80"
 /// space
 #define AIRLESS_ATMOS "TEMP=2.7"
 /// -93.15°C snow and ice turfs
-#define FROZEN_ATMOS "o2=22;n2=82;TEMP=180"
+#define FROZEN_ATMOS GAS_O2 + "=22;" + GAS_N2 + "=82;TEMP=180"
+/// -14°C snow and ice turfs, a more breatheable coldroom atmos.
+#define COLD_ATMOS GAS_O2 + "=22;" + GAS_N2 + "=82;TEMP=259.15"
 /// -14°C kitchen coldroom, just might loss your tail; higher amount of mol to reach about 101.3 kpA
-#define KITCHEN_COLDROOM_ATMOS "o2=26;n2=97;TEMP=[COLD_ROOM_TEMP]"
+#define KITCHEN_COLDROOM_ATMOS GAS_O2 + "=26;" + GAS_N2 + "=97;TEMP=259.15"
 /// used in the holodeck burn test program
-#define BURNMIX_ATMOS "o2=2500;plasma=5000;TEMP=370"
+#define BURNMIX_ATMOS GAS_O2 + "=2500;" + GAS_PLASMA + "=5000;TEMP=370"
+///-153.15°C plasma air, used for burning people.
+#define BURNING_COLD GAS_N2 + "=82;" + GAS_PLASMA + "=24;TEMP=120"
+///Space temperature hyper nob
+#define SPACE_TEMP_NOBLIUM GAS_HYPER_NOBLIUM + "=7500;TEMP=2.7"
 
 //ATMOSPHERICS DEPARTMENT GAS TANK TURFS
-#define ATMOS_TANK_N2O "n2o=6000;TEMP=293.15"
-#define ATMOS_TANK_CO2 "co2=50000;TEMP=293.15"
-#define ATMOS_TANK_PLASMA "plasma=70000;TEMP=293.15"
-#define ATMOS_TANK_O2 "o2=100000;TEMP=293.15"
-#define ATMOS_TANK_N2 "n2=100000;TEMP=293.15"
-#define ATMOS_TANK_BZ "bz=100000;TEMP=293.15"
-#define ATMOS_TANK_FREON "freon=100000;TEMP=293.15"
-#define ATMOS_TANK_HALON "halon=100000;TEMP=293.15"
-#define ATMOS_TANK_HEALIUM "healium=100000;TEMP=293.15"
-#define ATMOS_TANK_H2 "hydrogen=100000;TEMP=293.15"
-#define ATMOS_TANK_HYPERNOBLIUM "nob=100000;TEMP=293.15"
-#define ATMOS_TANK_MIASMA "miasma=100000;TEMP=293.15"
-#define ATMOS_TANK_NITRIUM "nitrium=100000;TEMP=293.15"
-#define ATMOS_TANK_PLUOXIUM "pluox=100000;TEMP=293.15"
-#define ATMOS_TANK_PROTO_NITRATE "proto_nitrate=100000;TEMP=293.15"
-#define ATMOS_TANK_TRITIUM "tritium=100000;TEMP=293.15"
-#define ATMOS_TANK_H2O "water_vapor=100000;TEMP=293.15"
-#define ATMOS_TANK_ZAUKER "zauker=100000;TEMP=293.15"
-#define ATMOS_TANK_HELIUM "helium=100000;TEMP=293.15"
-#define ATMOS_TANK_ANTINOBLIUM "antinoblium=100000;TEMP=293.15"
-#define ATMOS_TANK_AIRMIX "o2=2644;n2=10580;TEMP=293.15"
+#define ATMOS_TANK_N2O GAS_N2O + "=6000;TEMP=293.15"
+#define ATMOS_TANK_CO2 GAS_CO2 + "=50000;TEMP=293.15"
+#define ATMOS_TANK_PLASMA GAS_PLASMA + "=70000;TEMP=293.15"
+#define ATMOS_TANK_O2 GAS_O2 + "=100000;TEMP=293.15"
+#define ATMOS_TANK_N2 GAS_N2 + "=100000;TEMP=293.15"
+#define ATMOS_TANK_BZ GAS_BZ + "=100000;TEMP=293.15"
+#define ATMOS_TANK_FREON GAS_FREON + "=100000;TEMP=293.15"
+#define ATMOS_TANK_HALON GAS_HALON + "=100000;TEMP=293.15"
+#define ATMOS_TANK_HEALIUM GAS_HEALIUM + "=100000;TEMP=293.15"
+#define ATMOS_TANK_H2 GAS_HYDROGEN + "=100000;TEMP=293.15"
+#define ATMOS_TANK_HYPERNOBLIUM GAS_HYPER_NOBLIUM + "=100000;TEMP=293.15"
+#define ATMOS_TANK_MIASMA GAS_MIASMA + "=100000;TEMP=293.15"
+#define ATMOS_TANK_NITRIUM GAS_NITRIUM + "=100000;TEMP=293.15"
+#define ATMOS_TANK_PLUOXIUM GAS_PLUOXIUM + "=100000;TEMP=293.15"
+#define ATMOS_TANK_PROTO_NITRATE GAS_PROTO_NITRATE + "=100000;TEMP=293.15"
+#define ATMOS_TANK_TRITIUM GAS_TRITIUM + "=100000;TEMP=293.15"
+#define ATMOS_TANK_H2O GAS_WATER_VAPOR + "=100000;TEMP=293.15"
+#define ATMOS_TANK_ZAUKER GAS_ZAUKER + "=100000;TEMP=293.15"
+#define ATMOS_TANK_HELIUM GAS_HELIUM + "=100000;TEMP=293.15"
+#define ATMOS_TANK_ANTINOBLIUM GAS_ANTINOBLIUM + "=100000;TEMP=293.15"
+#define ATMOS_TANK_AIRMIX GAS_O2 + "=2644;" + GAS_N2 + "=10580;TEMP=293.15"
 
 //LAVALAND
 /// what pressure you have to be under to increase the effect of equipment meant for lavaland
diff --git a/code/__HELPERS/spatial_info.dm b/code/__HELPERS/spatial_info.dm
index 7cc953691e7..b98ff84a2e1 100644
--- a/code/__HELPERS/spatial_info.dm
+++ b/code/__HELPERS/spatial_info.dm
@@ -1,8 +1,3 @@
-/turf
-	///what /mob/oranges_ear instance is already assigned to us as there should only ever be one.
-	///used for guaranteeing there is only one oranges_ear per turf when assigned, speeds up view() iteration
-	var/mob/oranges_ear/assigned_oranges_ear
-
 /** # Oranges Ear
  *
  * turns out view() spends a significant portion of its processing time generating lists of contents of viewable turfs which includes EVERYTHING on it visible
diff --git a/code/datums/components/combustible_flooder.dm b/code/datums/components/combustible_flooder.dm
index 177da4399c9..e92393a7d4a 100644
--- a/code/datums/components/combustible_flooder.dm
+++ b/code/datums/components/combustible_flooder.dm
@@ -37,7 +37,7 @@
 		flooded_turf = parent_turf.ScrapeAway(1, CHANGETURF_INHERIT_AIR)
 		delete_parent = FALSE
 
-	flooded_turf.atmos_spawn_air("[gas_id]=[gas_amount];TEMP=[temp_amount || trigger_temperature]")
+	flooded_turf.atmos_spawn_air("[gas_id]=[gas_amount];[TURF_TEMPERATURE((temp_amount || trigger_temperature))]")
 
 	// Logging-related
 	var/admin_message = "[flooded_turf] ignited in [ADMIN_VERBOSEJMP(flooded_turf)]"
@@ -46,9 +46,8 @@
 		admin_message += " by [ADMIN_LOOKUPFLW(user)]"
 		user.log_message(log_message, LOG_ATTACK, log_globally = FALSE)//only individual log
 	else
-		log_message = "[key_name(user)] " + log_message
+		log_message = "[key_name(user)] " + log_message + " by fire"
 		admin_message += " by fire"
-		log_message += " by fire"
 		log_attack(log_message)
 	message_admins(admin_message)
 
diff --git a/code/game/machinery/computer/atmos_computers/__identifiers.dm b/code/game/machinery/computer/atmos_computers/__identifiers.dm
index ffb4d8aa479..2b007885cc7 100644
--- a/code/game/machinery/computer/atmos_computers/__identifiers.dm
+++ b/code/game/machinery/computer/atmos_computers/__identifiers.dm
@@ -3,28 +3,28 @@
 // They last three adds _sensor, _in, and _out respectively to the id_tag variable.
 // Dont put underscores here, we use them as delimiters.
 
-#define ATMOS_GAS_MONITOR_O2 "o2"
-#define ATMOS_GAS_MONITOR_PLAS "plas"
-#define ATMOS_GAS_MONITOR_AIR "air"
+#define ATMOS_GAS_MONITOR_O2 GAS_O2
+#define ATMOS_GAS_MONITOR_PLAS GAS_PLASMA
+#define ATMOS_GAS_MONITOR_AIR GAS_AIR
 #define ATMOS_GAS_MONITOR_MIX "mix"
-#define ATMOS_GAS_MONITOR_N2O "n2o"
-#define ATMOS_GAS_MONITOR_N2 "n2"
-#define ATMOS_GAS_MONITOR_CO2 "co2"
-#define ATMOS_GAS_MONITOR_BZ "bz"
-#define ATMOS_GAS_MONITOR_FREON "freon"
-#define ATMOS_GAS_MONITOR_HALON "halon"
-#define ATMOS_GAS_MONITOR_HEALIUM "healium"
-#define ATMOS_GAS_MONITOR_H2 "h2"
-#define ATMOS_GAS_MONITOR_HYPERNOBLIUM "hypernoblium"
-#define ATMOS_GAS_MONITOR_MIASMA "miasma"
-#define ATMOS_GAS_MONITOR_NITRIUM "nitrium"
-#define ATMOS_GAS_MONITOR_PLUOXIUM "pluoxium"
-#define ATMOS_GAS_MONITOR_PROTO_NITRATE "proto-nitrate"
-#define ATMOS_GAS_MONITOR_TRITIUM "tritium"
-#define ATMOS_GAS_MONITOR_H2O "h2o"
-#define ATMOS_GAS_MONITOR_ZAUKER "zauker"
-#define ATMOS_GAS_MONITOR_HELIUM "helium"
-#define ATMOS_GAS_MONITOR_ANTINOBLIUM "antinoblium"
+#define ATMOS_GAS_MONITOR_N2O GAS_N2O
+#define ATMOS_GAS_MONITOR_N2 GAS_N2
+#define ATMOS_GAS_MONITOR_CO2 GAS_CO2
+#define ATMOS_GAS_MONITOR_BZ GAS_BZ
+#define ATMOS_GAS_MONITOR_FREON GAS_FREON
+#define ATMOS_GAS_MONITOR_HALON GAS_HALON
+#define ATMOS_GAS_MONITOR_HEALIUM GAS_HEALIUM
+#define ATMOS_GAS_MONITOR_H2 GAS_HYDROGEN
+#define ATMOS_GAS_MONITOR_HYPERNOBLIUM GAS_HYPER_NOBLIUM
+#define ATMOS_GAS_MONITOR_MIASMA GAS_MIASMA
+#define ATMOS_GAS_MONITOR_NITRIUM GAS_NITRIUM
+#define ATMOS_GAS_MONITOR_PLUOXIUM GAS_PLUOXIUM
+#define ATMOS_GAS_MONITOR_PROTO_NITRATE GAS_PROTO_NITRATE
+#define ATMOS_GAS_MONITOR_TRITIUM GAS_TRITIUM
+#define ATMOS_GAS_MONITOR_H2O GAS_WATER_VAPOR
+#define ATMOS_GAS_MONITOR_ZAUKER GAS_ZAUKER
+#define ATMOS_GAS_MONITOR_HELIUM GAS_HEALIUM
+#define ATMOS_GAS_MONITOR_ANTINOBLIUM GAS_ANTINOBLIUM
 #define ATMOS_GAS_MONITOR_INCINERATOR "incinerator"
 #define ATMOS_GAS_MONITOR_ORDNANCE_BURN "ordnanceburn"
 #define ATMOS_GAS_MONITOR_ORDNANCE_FREEZER "ordnancefreezer"
diff --git a/code/game/objects/effects/anomalies/anomalies_pyroclastic.dm b/code/game/objects/effects/anomalies/anomalies_pyroclastic.dm
index 09d69142e21..f97f3482e83 100644
--- a/code/game/objects/effects/anomalies/anomalies_pyroclastic.dm
+++ b/code/game/objects/effects/anomalies/anomalies_pyroclastic.dm
@@ -16,7 +16,7 @@
 		ticks -= releasedelay
 	var/turf/open/tile = get_turf(src)
 	if(istype(tile))
-		tile.atmos_spawn_air("o2=5;plasma=5;TEMP=1000")
+		tile.atmos_spawn_air("[GAS_O2]=5;[GAS_PLASMA]=5;[TURF_TEMPERATURE(1000)]")
 	return TRUE
 
 /obj/effect/anomaly/pyro/detonate()
@@ -25,7 +25,7 @@
 /obj/effect/anomaly/pyro/proc/makepyroslime()
 	var/turf/open/tile = get_turf(src)
 	if(istype(tile))
-		tile.atmos_spawn_air("o2=500;plasma=500;TEMP=1000") //Make it hot and burny for the new slime
+		tile.atmos_spawn_air("[GAS_O2]=500;[GAS_PLASMA]=500;[TURF_TEMPERATURE(1000)]") //Make it hot and burny for the new slime
 
 	var/new_colour = pick("red", "orange")
 	var/mob/living/simple_animal/slime/pyro = new(tile, new_colour)
diff --git a/code/game/objects/effects/effect_system/fluid_spread/effects_foam.dm b/code/game/objects/effects/effect_system/fluid_spread/effects_foam.dm
index 1a98afb01af..80f393e97db 100644
--- a/code/game/objects/effects/effect_system/fluid_spread/effects_foam.dm
+++ b/code/game/objects/effects/effect_system/fluid_spread/effects_foam.dm
@@ -423,7 +423,7 @@
 	location.ClearWet()
 	if(location.air)
 		var/datum/gas_mixture/air = location.air
-		air.temperature = 293.15
+		air.temperature = T20C
 		for(var/obj/effect/hotspot/fire in location)
 			qdel(fire)
 
diff --git a/code/game/objects/effects/effect_system/fluid_spread/effects_smoke.dm b/code/game/objects/effects/effect_system/fluid_spread/effects_smoke.dm
index c2ba1568a06..dae527c3e6b 100644
--- a/code/game/objects/effects/effect_system/fluid_spread/effects_smoke.dm
+++ b/code/game/objects/effects/effect_system/fluid_spread/effects_smoke.dm
@@ -330,7 +330,7 @@
 
 /// A variant of the base freezing smoke formerly used by the vent decontamination event.
 /datum/effect_system/fluid_spread/smoke/freezing/decon
-	temperature = 293.15
+	temperature = T20C
 	distcheck = FALSE
 	weldvents = FALSE
 
diff --git a/code/game/objects/effects/mines.dm b/code/game/objects/effects/mines.dm
index e7594e7c560..d71e851896d 100644
--- a/code/game/objects/effects/mines.dm
+++ b/code/game/objects/effects/mines.dm
@@ -177,7 +177,7 @@
 /obj/effect/mine/gas
 	name = "oxygen mine"
 	var/gas_amount = 360
-	var/gas_type = "o2"
+	var/gas_type = GAS_O2
 
 /obj/effect/mine/gas/mineEffect(mob/victim)
 	atmos_spawn_air("[gas_type]=[gas_amount]")
@@ -185,18 +185,18 @@
 
 /obj/effect/mine/gas/plasma
 	name = "plasma mine"
-	gas_type = "plasma"
+	gas_type = GAS_PLASMA
 
 
 /obj/effect/mine/gas/n2o
 	name = "\improper N2O mine"
-	gas_type = "n2o"
+	gas_type = GAS_N2O
 
 
 /obj/effect/mine/gas/water_vapor
 	name = "chilled vapor mine"
 	gas_amount = 500
-	gas_type = "water_vapor"
+	gas_type = GAS_WATER_VAPOR
 
 /obj/effect/mine/sound
 	name = "honkblaster 1000"
diff --git a/code/game/objects/items/grenades/atmos_grenades.dm b/code/game/objects/items/grenades/atmos_grenades.dm
index 4a22de46778..9f35ac6824c 100644
--- a/code/game/objects/items/grenades/atmos_grenades.dm
+++ b/code/game/objects/items/grenades/atmos_grenades.dm
@@ -68,7 +68,7 @@
 			continue
 		var/distance_from_center = max(get_dist(turf_loc, loc), 1)
 		var/turf/open/floor_loc = turf_loc
-		floor_loc.atmos_spawn_air("n2=[n2_gas_amount / distance_from_center];o2=[o2_gas_amount / distance_from_center];TEMP=273")
+		floor_loc.atmos_spawn_air("[GAS_N2]=[n2_gas_amount / distance_from_center];[GAS_O2]=[o2_gas_amount / distance_from_center];[TURF_TEMPERATURE(273)]")
 	qdel(src)
 
 /obj/item/grenade/gas_crystal/nitrous_oxide_crystal
@@ -92,7 +92,7 @@
 			continue
 		var/distance_from_center = max(get_dist(turf_loc, loc), 1)
 		var/turf/open/floor_loc = turf_loc
-		floor_loc.atmos_spawn_air("n2o=[n2o_gas_amount / distance_from_center];TEMP=273")
+		floor_loc.atmos_spawn_air("[GAS_N2O]=[n2o_gas_amount / distance_from_center];[TURF_TEMPERATURE(273)]")
 	qdel(src)
 
 /obj/item/grenade/gas_crystal/crystal_foam
diff --git a/code/game/objects/items/stacks/sheets/mineral.dm b/code/game/objects/items/stacks/sheets/mineral.dm
index fb6540461f4..527af398bd2 100644
--- a/code/game/objects/items/stacks/sheets/mineral.dm
+++ b/code/game/objects/items/stacks/sheets/mineral.dm
@@ -451,7 +451,7 @@ GLOBAL_LIST_INIT(abductor_recipes, list ( \
 		return ..()
 
 /obj/item/stack/sheet/mineral/coal/fire_act(exposed_temperature, exposed_volume)
-	atmos_spawn_air("co2=[amount*10];TEMP=[exposed_temperature]")
+	atmos_spawn_air("[GAS_CO2]=[amount*10];[TURF_TEMPERATURE(exposed_temperature)]")
 	qdel(src)
 
 /obj/item/stack/sheet/mineral/coal/five
diff --git a/code/game/turfs/closed/minerals.dm b/code/game/turfs/closed/minerals.dm
index 803554a6bbf..6be28e9c0b3 100644
--- a/code/game/turfs/closed/minerals.dm
+++ b/code/game/turfs/closed/minerals.dm
@@ -630,10 +630,7 @@
 /turf/closed/mineral/snowmountain/coldroom
 	baseturfs = /turf/open/misc/asteroid/snow/coldroom
 	turf_type = /turf/open/misc/asteroid/snow/coldroom
-
-/turf/closed/mineral/snowmountain/coldroom/Initialize(mapload)
 	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
-	return ..()
 
 //yoo RED ROCK RED ROCK
 
diff --git a/code/game/turfs/open/asteroid.dm b/code/game/turfs/open/asteroid.dm
index a7f78ec5904..c3f32160f41 100644
--- a/code/game/turfs/open/asteroid.dm
+++ b/code/game/turfs/open/asteroid.dm
@@ -231,7 +231,7 @@ GLOBAL_LIST_EMPTY(dug_up_basalt)
 	name = "icy snow"
 	desc = "Looks colder."
 	baseturfs = /turf/open/misc/asteroid/snow/ice
-	initial_gas_mix = "n2=82;plasma=24;TEMP=120"
+	initial_gas_mix = BURNING_COLD
 	floor_variance = 0
 	icon_state = "snow-ice"
 	base_icon_state = "snow-ice"
@@ -258,18 +258,15 @@ GLOBAL_LIST_EMPTY(dug_up_basalt)
 	worm_chance = 0
 
 /turf/open/misc/asteroid/snow/temperatre
-	initial_gas_mix = "o2=22;n2=82;TEMP=255.37"
+	initial_gas_mix = COLD_ATMOS
 
 //Used for when you want to have real, genuine snow in your kitchen's cold room
 /turf/open/misc/asteroid/snow/coldroom
 	baseturfs = /turf/open/misc/asteroid/snow/coldroom
+	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
 	planetary_atmos = FALSE
 	temperature = COLD_ROOM_TEMP
 
-/turf/open/misc/asteroid/snow/coldroom/Initialize(mapload)
-	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
-	return ..()
-
 //Used in SnowCabin.dm
 /turf/open/misc/asteroid/snow/snow_cabin
 	temperature = 180
diff --git a/code/game/turfs/open/floor/iron_floor.dm b/code/game/turfs/open/floor/iron_floor.dm
index 8e42e606ab1..d38aedfd4f9 100644
--- a/code/game/turfs/open/floor/iron_floor.dm
+++ b/code/game/turfs/open/floor/iron_floor.dm
@@ -437,10 +437,7 @@
 
 /turf/open/floor/iron/kitchen_coldroom
 	name = "cold room floor"
-
-/turf/open/floor/iron/kitchen_coldroom/Initialize(mapload)
 	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
-	return ..()
 
 /turf/open/floor/iron/kitchen_coldroom/freezerfloor
 	icon_state = "freezerfloor"
diff --git a/code/game/turfs/open/floor/plating/misc_plating.dm b/code/game/turfs/open/floor/plating/misc_plating.dm
index 1cfb360eff4..1933b291aee 100644
--- a/code/game/turfs/open/floor/plating/misc_plating.dm
+++ b/code/game/turfs/open/floor/plating/misc_plating.dm
@@ -55,7 +55,7 @@
 	heavyfootstep = FOOTSTEP_GENERIC_HEAVY
 
 /turf/open/floor/plating/snowed/cavern
-	initial_gas_mix = "n2=82;plasma=24;TEMP=120"
+	initial_gas_mix = BURNING_COLD
 
 /turf/open/floor/plating/snowed/icemoon
 	initial_gas_mix = ICEMOON_DEFAULT_ATMOS
@@ -74,13 +74,10 @@
 
 // When you want real, genuine snowed plating in your kitchen's cold room.
 /turf/open/floor/plating/snowed/coldroom
+	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
 	planetary_atmos = FALSE
 	temperature = COLD_ROOM_TEMP
 
-/turf/open/floor/plating/snowed/coldroom/Initialize(mapload)
-	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
-	return ..()
-
 //Used in SnowCabin.dm
 /turf/open/floor/plating/snowed/snow_cabin
 	temperature = 180
diff --git a/code/game/turfs/open/ice.dm b/code/game/turfs/open/ice.dm
index 49ecb84aeb7..96bf1baac09 100644
--- a/code/game/turfs/open/ice.dm
+++ b/code/game/turfs/open/ice.dm
@@ -43,15 +43,12 @@
 /turf/open/misc/ice/temperate
 	baseturfs = /turf/open/misc/ice/temperate
 	desc = "Somehow, it is not melting under these conditions. Must be some very thick ice. Just as slippery too."
-	initial_gas_mix = "o2=22;n2=82;TEMP=255.37" //it works with /turf/open/misc/asteroid/snow/temperatre
+	initial_gas_mix = COLD_ATMOS //it works with /turf/open/misc/asteroid/snow/temperatre
 
 //For when you want real, genuine ice in your kitchen's cold room.
 /turf/open/misc/ice/coldroom
 	desc = "Somehow, it is not melting under these conditions. Must be some very thick ice. Just as slippery too."
 	baseturfs = /turf/open/misc/ice/coldroom
+	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
 	planetary_atmos = FALSE
 	temperature = COLD_ROOM_TEMP
-
-/turf/open/misc/ice/coldroom/Initialize(mapload)
-	initial_gas_mix = KITCHEN_COLDROOM_ATMOS
-	return ..()
diff --git a/code/game/turfs/open/lava.dm b/code/game/turfs/open/lava.dm
index f0cf7a0e1fb..2675c60dd58 100644
--- a/code/game/turfs/open/lava.dm
+++ b/code/game/turfs/open/lava.dm
@@ -342,7 +342,7 @@
 	name = "liquid plasma"
 	desc = "A flowing stream of chilled liquid plasma. You probably shouldn't get in."
 	icon_state = "liquidplasma"
-	initial_gas_mix = "n2=82;plasma=24;TEMP=120"
+	initial_gas_mix = BURNING_COLD
 	baseturfs = /turf/open/lava/plasma
 
 	light_range = 3
diff --git a/code/game/turfs/turf.dm b/code/game/turfs/turf.dm
index 180f7307af7..b52182a88e8 100644
--- a/code/game/turfs/turf.dm
+++ b/code/game/turfs/turf.dm
@@ -6,6 +6,10 @@ GLOBAL_LIST_EMPTY(station_turfs)
 	vis_flags = VIS_INHERIT_ID // Important for interaction with and visualization of openspace.
 	luminosity = 1
 
+	///what /mob/oranges_ear instance is already assigned to us as there should only ever be one.
+	///used for guaranteeing there is only one oranges_ear per turf when assigned, speeds up view() iteration
+	var/mob/oranges_ear/assigned_oranges_ear
+
 	/// Turf bitflags, see code/__DEFINES/flags.dm
 	var/turf_flags = NONE
 
diff --git a/code/modules/antagonists/abductor/equipment/glands/plasma.dm b/code/modules/antagonists/abductor/equipment/glands/plasma.dm
index 92aa7abcc45..c167dd8a329 100644
--- a/code/modules/antagonists/abductor/equipment/glands/plasma.dm
+++ b/code/modules/antagonists/abductor/equipment/glands/plasma.dm
@@ -18,5 +18,5 @@
 	owner.visible_message(span_danger("[owner] vomits a cloud of plasma!"))
 	var/turf/open/T = get_turf(owner)
 	if(istype(T))
-		T.atmos_spawn_air("plasma=50;TEMP=[T20C]")
+		T.atmos_spawn_air("[GAS_PLASMA]=50;[TURF_TEMPERATURE(T20C)]")
 	owner.vomit()
diff --git a/code/modules/atmospherics/environmental/LINDA_turf_tile.dm b/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
index 50ae0888355..a5822084b61 100644
--- a/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
+++ b/code/modules/atmospherics/environmental/LINDA_turf_tile.dm
@@ -62,7 +62,7 @@
 				var/datum/gas_mixture/immutable/planetary/mix = new
 				mix.parse_string_immutable(initial_gas_mix)
 				SSair.planetary[initial_gas_mix] = mix
-	. = ..()
+	return ..()
 
 /turf/open/Destroy()
 	if(active_hotspot)
diff --git a/code/modules/atmospherics/gasmixtures/gas_types.dm b/code/modules/atmospherics/gasmixtures/gas_types.dm
index 8747125c5d0..a6467b71305 100644
--- a/code/modules/atmospherics/gasmixtures/gas_types.dm
+++ b/code/modules/atmospherics/gasmixtures/gas_types.dm
@@ -68,7 +68,7 @@
 
 
 /datum/gas/oxygen
-	id = "o2"
+	id = GAS_O2
 	specific_heat = 20
 	name = "Oxygen"
 	rarity = 900
@@ -77,7 +77,7 @@
 	desc = "The gas most life forms need to be able to survive. Also an oxidizer."
 
 /datum/gas/nitrogen
-	id = "n2"
+	id = GAS_N2
 	specific_heat = 20
 	name = "Nitrogen"
 	rarity = 1000
@@ -86,7 +86,7 @@
 	desc = "A very common gas that used to pad artifical atmospheres to habitable pressure."
 
 /datum/gas/carbon_dioxide //what the fuck is this?
-	id = "co2"
+	id = GAS_CO2
 	specific_heat = 30
 	name = "Carbon Dioxide"
 	dangerous = TRUE
@@ -96,7 +96,7 @@
 	desc = "What the fuck is carbon dioxide?"
 
 /datum/gas/plasma
-	id = "plasma"
+	id = GAS_PLASMA
 	specific_heat = 200
 	name = "Plasma"
 	gas_overlay = "plasma"
@@ -107,7 +107,7 @@
 	desc = "A flammable gas with many other curious properties. It's research is one of NT's primary objective."
 
 /datum/gas/water_vapor
-	id = "water_vapor"
+	id = GAS_WATER_VAPOR
 	specific_heat = 40
 	name = "Water Vapor"
 	gas_overlay = "water_vapor"
@@ -119,7 +119,7 @@
 	desc = "Water, in gas form. Makes things slippery."
 
 /datum/gas/hypernoblium
-	id = "nob"
+	id = GAS_HYPER_NOBLIUM
 	specific_heat = 2000
 	name = "Hyper-noblium"
 	gas_overlay = "freon"
@@ -130,7 +130,7 @@
 	desc = "The most noble gas of them all. High quantities of hyper-noblium actively prevents reactions from occuring."
 
 /datum/gas/nitrous_oxide
-	id = "n2o"
+	id = GAS_N2O
 	specific_heat = 40
 	name = "Nitrous Oxide"
 	gas_overlay = "nitrous_oxide"
@@ -143,7 +143,7 @@
 	desc = "Causes drowsiness, euphoria, and eventually unconsciousness."
 
 /datum/gas/nitrium
-	id = "nitrium"
+	id = GAS_NITRIUM
 	specific_heat = 10
 	name = "Nitrium"
 	fusion_power = 7
@@ -155,7 +155,7 @@
 	desc = "An experimental performance enhancing gas. Nitrium can have amplified effects as more of it gets into your bloodstream."
 
 /datum/gas/tritium
-	id = "tritium"
+	id = GAS_TRITIUM
 	specific_heat = 10
 	name = "Tritium"
 	gas_overlay = "tritium"
@@ -167,7 +167,7 @@
 	desc = "A highly flammable and radioctive gas."
 
 /datum/gas/bz
-	id = "bz"
+	id = GAS_BZ
 	specific_heat = 20
 	name = "BZ"
 	dangerous = TRUE
@@ -178,7 +178,7 @@
 	desc = "A powerful hallucinogenic nerve agent able to induce cognitive damage."
 
 /datum/gas/pluoxium
-	id = "pluox"
+	id = GAS_PLUOXIUM
 	specific_heat = 80
 	name = "Pluoxium"
 	fusion_power = -10
@@ -187,7 +187,7 @@
 	desc = "A gas that could supply even more oxygen to the bloodstream when inhaled, without being an oxidizer."
 
 /datum/gas/miasma
-	id = "miasma"
+	id = GAS_MIASMA
 	specific_heat = 20
 	name = "Miasma"
 	dangerous = TRUE
@@ -198,7 +198,7 @@
 	desc = "Not necessarily a gas, miasma refers to biological pollutants found in the atmosphere."
 
 /datum/gas/freon
-	id = "freon"
+	id = GAS_FREON
 	specific_heat = 600
 	name = "Freon"
 	dangerous = TRUE
@@ -210,7 +210,7 @@
 	desc = "A coolant gas. Mainly used for it's endothermic reaction with oxygen."
 
 /datum/gas/hydrogen
-	id = "hydrogen"
+	id = GAS_HYDROGEN
 	specific_heat = 15
 	name = "Hydrogen"
 	dangerous = TRUE
@@ -220,7 +220,7 @@
 	desc = "A highly flammable gas."
 
 /datum/gas/healium
-	id = "healium"
+	id = GAS_HEALIUM
 	specific_heat = 10
 	name = "Healium"
 	dangerous = TRUE
@@ -231,7 +231,7 @@
 	desc = "Causes deep, regenerative sleep."
 
 /datum/gas/proto_nitrate
-	id = "proto_nitrate"
+	id = GAS_PROTO_NITRATE
 	specific_heat = 30
 	name = "Proto Nitrate"
 	dangerous = TRUE
@@ -242,7 +242,7 @@
 	desc = "A very volatile gas that reacts differently with various gases."
 
 /datum/gas/zauker
-	id = "zauker"
+	id = GAS_ZAUKER
 	specific_heat = 350
 	name = "Zauker"
 	dangerous = TRUE
@@ -253,7 +253,7 @@
 	desc = "A highly toxic gas, it's production is highly regulated on top of being difficult. It also breaks down when in contact with nitrogen."
 
 /datum/gas/halon
-	id = "halon"
+	id = GAS_HALON
 	specific_heat = 175
 	name = "Halon"
 	dangerous = TRUE
@@ -264,7 +264,7 @@
 	desc = "A potent fire supressant. Removes oxygen from high temperature fires and cools down the area"
 
 /datum/gas/helium
-	id = "helium"
+	id = GAS_HELIUM
 	specific_heat = 15
 	name = "Helium"
 	fusion_power = 7
@@ -273,7 +273,7 @@
 	desc = "A very inert gas produced by the fusion of hydrogen and it's derivatives."
 
 /datum/gas/antinoblium
-	id = "antinoblium"
+	id = GAS_ANTINOBLIUM
 	specific_heat = 1
 	name = "Antinoblium"
 	dangerous = TRUE
diff --git a/code/modules/atmospherics/gasmixtures/reactions.dm b/code/modules/atmospherics/gasmixtures/reactions.dm
index 36d7d2efe4e..d3b76880227 100644
--- a/code/modules/atmospherics/gasmixtures/reactions.dm
+++ b/code/modules/atmospherics/gasmixtures/reactions.dm
@@ -65,7 +65,7 @@
 	 *
 	 * E.G.
 	 * factor["Temperature"] = "Minimum temperature of 20 kelvins, maximum temperature of 100 kelvins"
-	 * factor["o2"] = "Minimum oxygen amount of 20 moles, more oxygen increases reaction rate up to 150 moles"
+	 * factor[GAS_O2] = "Minimum oxygen amount of 20 moles, more oxygen increases reaction rate up to 150 moles"
 	 */
 	var/list/factor
 
diff --git a/code/modules/atmospherics/machinery/portable/canister.dm b/code/modules/atmospherics/machinery/portable/canister.dm
index ed9e3be476f..9919794e03a 100644
--- a/code/modules/atmospherics/machinery/portable/canister.dm
+++ b/code/modules/atmospherics/machinery/portable/canister.dm
@@ -5,28 +5,28 @@ GLOBAL_LIST_INIT(gas_id_to_canister, init_gas_id_to_canister())
 
 /proc/init_gas_id_to_canister()
 	return sort_list(list(
-		"n2" = /obj/machinery/portable_atmospherics/canister/nitrogen,
-		"o2" = /obj/machinery/portable_atmospherics/canister/oxygen,
-		"co2" = /obj/machinery/portable_atmospherics/canister/carbon_dioxide,
-		"plasma" = /obj/machinery/portable_atmospherics/canister/plasma,
-		"n2o" = /obj/machinery/portable_atmospherics/canister/nitrous_oxide,
-		"nitrium" = /obj/machinery/portable_atmospherics/canister/nitrium,
-		"bz" = /obj/machinery/portable_atmospherics/canister/bz,
-		"air" = /obj/machinery/portable_atmospherics/canister/air,
-		"water_vapor" = /obj/machinery/portable_atmospherics/canister/water_vapor,
-		"tritium" = /obj/machinery/portable_atmospherics/canister/tritium,
-		"hyper-noblium" = /obj/machinery/portable_atmospherics/canister/nob,
-		"pluoxium" = /obj/machinery/portable_atmospherics/canister/pluoxium,
+		GAS_N2 = /obj/machinery/portable_atmospherics/canister/nitrogen,
+		GAS_O2 = /obj/machinery/portable_atmospherics/canister/oxygen,
+		GAS_CO2 = /obj/machinery/portable_atmospherics/canister/carbon_dioxide,
+		GAS_PLASMA = /obj/machinery/portable_atmospherics/canister/plasma,
+		GAS_N2O = /obj/machinery/portable_atmospherics/canister/nitrous_oxide,
+		GAS_NITRIUM = /obj/machinery/portable_atmospherics/canister/nitrium,
+		GAS_BZ = /obj/machinery/portable_atmospherics/canister/bz,
+		GAS_AIR = /obj/machinery/portable_atmospherics/canister/air,
+		GAS_WATER_VAPOR = /obj/machinery/portable_atmospherics/canister/water_vapor,
+		GAS_TRITIUM = /obj/machinery/portable_atmospherics/canister/tritium,
+		GAS_HYPER_NOBLIUM = /obj/machinery/portable_atmospherics/canister/nob,
+		GAS_PLUOXIUM = /obj/machinery/portable_atmospherics/canister/pluoxium,
 		"caution" = /obj/machinery/portable_atmospherics/canister,
-		"miasma" = /obj/machinery/portable_atmospherics/canister/miasma,
-		"freon" = /obj/machinery/portable_atmospherics/canister/freon,
-		"hydrogen" = /obj/machinery/portable_atmospherics/canister/hydrogen,
-		"healium" = /obj/machinery/portable_atmospherics/canister/healium,
-		"proto_nitrate" = /obj/machinery/portable_atmospherics/canister/proto_nitrate,
-		"zauker" = /obj/machinery/portable_atmospherics/canister/zauker,
-		"helium" = /obj/machinery/portable_atmospherics/canister/helium,
-		"antinoblium" = /obj/machinery/portable_atmospherics/canister/antinoblium,
-		"halon" = /obj/machinery/portable_atmospherics/canister/halon
+		GAS_MIASMA = /obj/machinery/portable_atmospherics/canister/miasma,
+		GAS_FREON = /obj/machinery/portable_atmospherics/canister/freon,
+		GAS_HYDROGEN = /obj/machinery/portable_atmospherics/canister/hydrogen,
+		GAS_HEALIUM = /obj/machinery/portable_atmospherics/canister/healium,
+		GAS_PROTO_NITRATE = /obj/machinery/portable_atmospherics/canister/proto_nitrate,
+		GAS_ZAUKER = /obj/machinery/portable_atmospherics/canister/zauker,
+		GAS_HELIUM = /obj/machinery/portable_atmospherics/canister/helium,
+		GAS_ANTINOBLIUM = /obj/machinery/portable_atmospherics/canister/antinoblium,
+		GAS_HALON = /obj/machinery/portable_atmospherics/canister/halon
 	))
 
 /obj/machinery/portable_atmospherics/canister
diff --git a/code/modules/awaymissions/mission_code/snowdin.dm b/code/modules/awaymissions/mission_code/snowdin.dm
index 73da55ad2fe..e85a3e6ddb7 100644
--- a/code/modules/awaymissions/mission_code/snowdin.dm
+++ b/code/modules/awaymissions/mission_code/snowdin.dm
@@ -155,7 +155,7 @@
 
 /turf/open/floor/iron/dark/snowdin
 	initial_gas_mix = FROZEN_ATMOS
-	planetary_atmos = 1
+	planetary_atmos = TRUE
 	temperature = 180
 
 /////////// papers
diff --git a/code/modules/clothing/under/accessories.dm b/code/modules/clothing/under/accessories.dm
index 32d704468f0..5b022a33226 100644
--- a/code/modules/clothing/under/accessories.dm
+++ b/code/modules/clothing/under/accessories.dm
@@ -266,7 +266,7 @@
 	return exposed_temperature > 300
 
 /obj/item/clothing/accessory/medal/plasma/atmos_expose(datum/gas_mixture/air, exposed_temperature)
-	atmos_spawn_air("plasma=20;TEMP=[exposed_temperature]")
+	atmos_spawn_air("[GAS_PLASMA]=20;[TURF_TEMPERATURE(exposed_temperature)]")
 	visible_message(span_danger("\The [src] bursts into flame!"), span_userdanger("Your [src] bursts into flame!"))
 	qdel(src)
 
diff --git a/code/modules/events/aurora_caelus.dm b/code/modules/events/aurora_caelus.dm
index 330779c7a6e..d45578299e7 100644
--- a/code/modules/events/aurora_caelus.dm
+++ b/code/modules/events/aurora_caelus.dm
@@ -42,7 +42,7 @@
 			if(roast_ruiner)
 				roast_ruiner.balloon_alert_to_viewers("oh egads!")
 				var/turf/ruined_roast = get_turf(roast_ruiner)
-				ruined_roast.atmos_spawn_air("plasma=100;TEMP=1000")
+				ruined_roast.atmos_spawn_air("[GAS_PLASMA]=100;[TURF_TEMPERATURE(1000)]")
 				message_admins("Aurora Caelus event caused an oven to ignite at [ADMIN_VERBOSEJMP(ruined_roast)].")
 				log_game("Aurora Caelus event caused an oven to ignite at [loc_name(ruined_roast)].")
 				announce_to_ghosts(roast_ruiner)
diff --git a/code/modules/food_and_drinks/machinery/smartfridge.dm b/code/modules/food_and_drinks/machinery/smartfridge.dm
index 6ebc4f1aff0..d7573975081 100644
--- a/code/modules/food_and_drinks/machinery/smartfridge.dm
+++ b/code/modules/food_and_drinks/machinery/smartfridge.dm
@@ -500,7 +500,7 @@
 	. = ..()
 	if(. & EMP_PROTECT_SELF)
 		return
-	atmos_spawn_air("TEMP=1000")
+	atmos_spawn_air("[TURF_TEMPERATURE(1000)]")
 
 
 // ----------------------------
diff --git a/code/modules/holodeck/turfs.dm b/code/modules/holodeck/turfs.dm
index 5f521bcb3dd..05e42b854cc 100644
--- a/code/modules/holodeck/turfs.dm
+++ b/code/modules/holodeck/turfs.dm
@@ -172,13 +172,11 @@
 	icon = 'icons/turf/snow.dmi'
 	icon_state = "snow"
 	slowdown = 2
+	initial_gas_mix = SPACE_TEMP_NOBLIUM
 	bullet_sizzle = TRUE
 	bullet_bounce_sound = null
 	tiled_dirt = FALSE
 
-/turf/open/floor/holofloor/snow/cold
-	initial_gas_mix = "nob=7500;TEMP=2.7"
-
 /turf/open/floor/holofloor/dark
 	icon_state = "darkfull"
 	desc = "The surrounding enviroment is so dark you can hardly see yourself."
diff --git a/code/modules/mapfluff/ruins/spaceruin_code/atmos_asteroid.dm b/code/modules/mapfluff/ruins/spaceruin_code/atmos_asteroid.dm
index a672780159f..99c2e5aa878 100644
--- a/code/modules/mapfluff/ruins/spaceruin_code/atmos_asteroid.dm
+++ b/code/modules/mapfluff/ruins/spaceruin_code/atmos_asteroid.dm
@@ -1,7 +1,7 @@
 /// ## A bunch of turf subtypes used to really make this ruin work.
 
 /// Define of the specific gas mix we want across all of the turfs.
-#define CO2_PRESSURIZED_MIX "o2=22;n2=82;co2=500;TEMP=293.15"
+#define CO2_PRESSURIZED_MIX GAS_O2 + "=22;" + GAS_N2 + "=82;" + GAS_CO2 + "=500;TEMP=T20C"
 
 /turf/open/floor/iron/co2_pressurized
 	initial_gas_mix = CO2_PRESSURIZED_MIX
diff --git a/code/modules/mob/living/basic/tree.dm b/code/modules/mob/living/basic/tree.dm
index 4ba0bdb94b9..3bde822af2e 100644
--- a/code/modules/mob/living/basic/tree.dm
+++ b/code/modules/mob/living/basic/tree.dm
@@ -69,7 +69,7 @@
 	if(co2 > 0 && SPT_PROB(13, seconds_per_tick))
 		var/amt = min(co2, 9)
 		our_turf.air.gases[/datum/gas/carbon_dioxide][MOLES] -= amt
-		our_turf.atmos_spawn_air("o2=[amt]")
+		our_turf.atmos_spawn_air("[GAS_O2]=[amt]")
 
 /mob/living/basic/tree/melee_attack(atom/target, list/modifiers)
 	. = ..()
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 214451c1cbe..18033f79479 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -75,32 +75,29 @@
 		return ..()
 
 /mob/living/carbon/human/check_breath(datum/gas_mixture/breath)
-	var/L = get_organ_slot(ORGAN_SLOT_LUNGS)
+	var/obj/item/organ/internal/lungs/human_lungs = get_organ_slot(ORGAN_SLOT_LUNGS)
+	if(human_lungs)
+		return human_lungs.check_breath(breath, src)
 
-	if(!L)
-		if(health >= crit_threshold)
-			adjustOxyLoss(HUMAN_MAX_OXYLOSS + 1)
-		else if(!HAS_TRAIT(src, TRAIT_NOCRITDAMAGE))
-			adjustOxyLoss(HUMAN_CRIT_MAX_OXYLOSS)
+	if(health >= crit_threshold)
+		adjustOxyLoss(HUMAN_MAX_OXYLOSS + 1)
+	else if(!HAS_TRAIT(src, TRAIT_NOCRITDAMAGE))
+		adjustOxyLoss(HUMAN_CRIT_MAX_OXYLOSS)
 
-		failed_last_breath = TRUE
+	failed_last_breath = TRUE
 
-		var/datum/species/S = dna.species
+	var/datum/species/human_species = dna.species
 
-		if(S.breathid == "o2")
+	switch(human_species.breathid)
+		if(GAS_O2)
 			throw_alert(ALERT_NOT_ENOUGH_OXYGEN, /atom/movable/screen/alert/not_enough_oxy)
-		else if(S.breathid == "plas")
+		if(GAS_PLASMA)
 			throw_alert(ALERT_NOT_ENOUGH_PLASMA, /atom/movable/screen/alert/not_enough_plas)
-		else if(S.breathid == "co2")
+		if(GAS_CO2)
 			throw_alert(ALERT_NOT_ENOUGH_CO2, /atom/movable/screen/alert/not_enough_co2)
-		else if(S.breathid == "n2")
+		if(GAS_N2)
 			throw_alert(ALERT_NOT_ENOUGH_NITRO, /atom/movable/screen/alert/not_enough_nitro)
-
-		return FALSE
-	else
-		if(istype(L, /obj/item/organ/internal/lungs))
-			var/obj/item/organ/internal/lungs/lun = L
-			lun.check_breath(breath,src)
+	return FALSE
 
 /// Environment handlers for species
 /mob/living/carbon/human/handle_environment(datum/gas_mixture/environment, seconds_per_tick, times_fired)
diff --git a/code/modules/mob/living/carbon/human/species.dm b/code/modules/mob/living/carbon/human/species.dm
index bbec9bb780d..562d03c137e 100644
--- a/code/modules/mob/living/carbon/human/species.dm
+++ b/code/modules/mob/living/carbon/human/species.dm
@@ -71,8 +71,6 @@ GLOBAL_LIST_EMPTY(features_by_species)
 	  * Layer hiding is handled by [/datum/species/proc/handle_mutant_bodyparts] below.
 	  */
 	var/list/mutant_bodyparts = list()
-	///Internal organs that are unique to this race, like a tail.
-	var/list/mutant_organs = list()
 	///The bodyparts this species uses. assoc of bodypart string - bodypart type. Make sure all the fucking entries are in or I'll skin you alive.
 	var/list/bodypart_overrides = list(
 		BODY_ZONE_L_ARM = /obj/item/bodypart/arm/left,
@@ -82,9 +80,29 @@ GLOBAL_LIST_EMPTY(features_by_species)
 		BODY_ZONE_R_LEG = /obj/item/bodypart/leg/right,
 		BODY_ZONE_CHEST = /obj/item/bodypart/chest,
 	)
+	///Internal organs that are unique to this race, like a tail.
+	var/list/mutant_organs = list()
 
 	///List of external organs to generate like horns, frills, wings, etc. list(typepath of organ = "Round Beautiful BDSM Snout"). Still WIP
 	var/list/external_organs = list()
+	///Replaces default brain with a different organ
+	var/obj/item/organ/internal/brain/mutantbrain = /obj/item/organ/internal/brain
+	///Replaces default heart with a different organ
+	var/obj/item/organ/internal/heart/mutantheart = /obj/item/organ/internal/heart
+	///Replaces default lungs with a different organ
+	var/obj/item/organ/internal/lungs/mutantlungs = /obj/item/organ/internal/lungs
+	///Replaces default eyes with a different organ
+	var/obj/item/organ/internal/eyes/mutanteyes = /obj/item/organ/internal/eyes
+	///Replaces default ears with a different organ
+	var/obj/item/organ/internal/ears/mutantears = /obj/item/organ/internal/ears
+	///Replaces default tongue with a different organ
+	var/obj/item/organ/internal/tongue/mutanttongue = /obj/item/organ/internal/tongue
+	///Replaces default liver with a different organ
+	var/obj/item/organ/internal/liver/mutantliver = /obj/item/organ/internal/liver
+	///Replaces default stomach with a different organ
+	var/obj/item/organ/internal/stomach/mutantstomach = /obj/item/organ/internal/stomach
+	///Replaces default appendix with a different organ.
+	var/obj/item/organ/internal/appendix/mutantappendix = /obj/item/organ/internal/appendix
 
 	///Multiplier for the race's speed. Positive numbers make it move slower, negative numbers make it move faster.
 	var/speedmod = 0
@@ -143,36 +161,13 @@ GLOBAL_LIST_EMPTY(features_by_species)
 	var/list/inherent_factions
 
 	///What gas does this species breathe? Used by suffocation screen alerts, most of actual gas breathing is handled by mutantlungs. See [life.dm][code/modules/mob/living/carbon/human/life.dm]
-	var/breathid = "o2"
+	var/breathid = GAS_O2
 
 	///What anim to use for dusting
 	var/dust_anim = "dust-h"
 	///What anim to use for gibbing
 	var/gib_anim = "gibbed-h"
 
-	// Prefer anything other than setting these to null, such as TRAITS
-	// why?
-	// because traits also disable the downsides of not having an organ, removing organs but not having the trait or logic will make your species die
-
-	///Replaces default brain with a different organ
-	var/obj/item/organ/internal/brain/mutantbrain = /obj/item/organ/internal/brain
-	///Replaces default heart with a different organ
-	var/obj/item/organ/internal/heart/mutantheart = /obj/item/organ/internal/heart
-	///Replaces default lungs with a different organ
-	var/obj/item/organ/internal/lungs/mutantlungs = /obj/item/organ/internal/lungs
-	///Replaces default eyes with a different organ
-	var/obj/item/organ/internal/eyes/mutanteyes = /obj/item/organ/internal/eyes
-	///Replaces default ears with a different organ
-	var/obj/item/organ/internal/ears/mutantears = /obj/item/organ/internal/ears
-	///Replaces default tongue with a different organ
-	var/obj/item/organ/internal/tongue/mutanttongue = /obj/item/organ/internal/tongue
-	///Replaces default liver with a different organ
-	var/obj/item/organ/internal/liver/mutantliver = /obj/item/organ/internal/liver
-	///Replaces default stomach with a different organ
-	var/obj/item/organ/internal/stomach/mutantstomach = /obj/item/organ/internal/stomach
-	///Replaces default appendix with a different organ.
-	var/obj/item/organ/internal/appendix/mutantappendix = /obj/item/organ/internal/appendix
-
 	///Bitflag that controls what in game ways something can select this species as a spawnable source, such as magic mirrors. See [mob defines][code/__DEFINES/mobs.dm] for possible sources.
 	var/changesource_flags = NONE
 
diff --git a/code/modules/mob/living/carbon/human/species_types/plasmamen.dm b/code/modules/mob/living/carbon/human/species_types/plasmamen.dm
index 34f0310c39b..ef6f07c376d 100644
--- a/code/modules/mob/living/carbon/human/species_types/plasmamen.dm
+++ b/code/modules/mob/living/carbon/human/species_types/plasmamen.dm
@@ -29,7 +29,7 @@
 	heatmod = 1.5
 	brutemod = 1.5
 	payday_modifier = 0.75
-	breathid = "plas"
+	breathid = GAS_PLASMA
 	disliked_food = FRUIT | CLOTH
 	liked_food = VEGETABLES
 	changesource_flags = MIRROR_BADMIN | WABBAJACK | MIRROR_PRIDE | MIRROR_MAGIC
diff --git a/code/modules/mob/living/simple_animal/hostile/regalrat.dm b/code/modules/mob/living/simple_animal/hostile/regalrat.dm
index 56756afc3b4..abd6756e666 100644
--- a/code/modules/mob/living/simple_animal/hostile/regalrat.dm
+++ b/code/modules/mob/living/simple_animal/hostile/regalrat.dm
@@ -206,7 +206,7 @@
 
 /datum/action/cooldown/domain/proc/domain()
 	var/turf/T = get_turf(owner)
-	T.atmos_spawn_air("miasma=4;TEMP=[T20C]")
+	T.atmos_spawn_air("[GAS_MIASMA]=4;[TURF_TEMPERATURE(T20C)]")
 	switch (rand(1,10))
 		if (8)
 			new /obj/effect/decal/cleanable/vomit(T)
diff --git a/code/modules/mod/modules/modules_general.dm b/code/modules/mod/modules/modules_general.dm
index 8de9c6f962e..0a96cee059a 100644
--- a/code/modules/mod/modules/modules_general.dm
+++ b/code/modules/mod/modules/modules_general.dm
@@ -365,7 +365,7 @@
 	/// The temperature we are regulating to.
 	var/temperature_setting = BODYTEMP_NORMAL
 	/// Minimum temperature we can set.
-	var/min_temp = 293.15
+	var/min_temp = T20C
 	/// Maximum temperature we can set.
 	var/max_temp = 318.15
 
diff --git a/code/modules/reagents/chemistry/reagents/other_reagents.dm b/code/modules/reagents/chemistry/reagents/other_reagents.dm
index 33aab793f2d..1b7a61d2a47 100644
--- a/code/modules/reagents/chemistry/reagents/other_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/other_reagents.dm
@@ -823,8 +823,7 @@
 /datum/reagent/oxygen/expose_turf(turf/open/exposed_turf, reac_volume)
 	. = ..()
 	if(istype(exposed_turf))
-		var/temp = holder ? holder.chem_temp : T20C
-		exposed_turf.atmos_spawn_air("o2=[reac_volume/20];TEMP=[temp]")
+		exposed_turf.atmos_spawn_air("[GAS_O2]=[reac_volume/20];[TURF_TEMPERATURE(holder ? holder.chem_temp : T20C)]")
 	return
 
 /datum/reagent/copper
@@ -856,8 +855,7 @@
 
 /datum/reagent/nitrogen/expose_turf(turf/open/exposed_turf, reac_volume)
 	if(istype(exposed_turf))
-		var/temp = holder ? holder.chem_temp : T20C
-		exposed_turf.atmos_spawn_air("n2=[reac_volume/20];TEMP=[temp]")
+		exposed_turf.atmos_spawn_air("[GAS_N2]=[reac_volume/20];[TURF_TEMPERATURE(holder ? holder.chem_temp : T20C)]")
 	return ..()
 
 /datum/reagent/hydrogen
@@ -1409,8 +1407,7 @@
 
 /datum/reagent/carbondioxide/expose_turf(turf/open/exposed_turf, reac_volume)
 	if(istype(exposed_turf))
-		var/temp = holder ? holder.chem_temp : T20C
-		exposed_turf.atmos_spawn_air("co2=[reac_volume/20];TEMP=[temp]")
+		exposed_turf.atmos_spawn_air("[GAS_CO2]=[reac_volume/20];[TURF_TEMPERATURE(holder ? holder.chem_temp : T20C)]")
 	return ..()
 
 /datum/reagent/nitrous_oxide
@@ -1427,8 +1424,7 @@
 /datum/reagent/nitrous_oxide/expose_turf(turf/open/exposed_turf, reac_volume)
 	. = ..()
 	if(istype(exposed_turf))
-		var/temp = holder ? holder.chem_temp : T20C
-		exposed_turf.atmos_spawn_air("n2o=[reac_volume/20];TEMP=[temp]")
+		exposed_turf.atmos_spawn_air("[GAS_N2O]=[reac_volume/20];[TURF_TEMPERATURE(holder ? holder.chem_temp : T20C)]")
 
 /datum/reagent/nitrous_oxide/expose_mob(mob/living/exposed_mob, methods=TOUCH, reac_volume)
 	. = ..()
diff --git a/code/modules/reagents/chemistry/reagents/toxin_reagents.dm b/code/modules/reagents/chemistry/reagents/toxin_reagents.dm
index 2e256fc6c9c..b358d2ede76 100644
--- a/code/modules/reagents/chemistry/reagents/toxin_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/toxin_reagents.dm
@@ -118,7 +118,7 @@
 	if((holder.flags & SEALED_CONTAINER) && (holder.chem_temp < LIQUID_PLASMA_IG))
 		return
 	var/atom/A = holder.my_atom
-	A.atmos_spawn_air("plasma=[volume];TEMP=[holder.chem_temp]")
+	A.atmos_spawn_air("[GAS_PLASMA]=[volume];[TURF_TEMPERATURE(holder.chem_temp)]")
 	holder.del_reagent(type)
 
 /datum/reagent/toxin/plasma/expose_turf(turf/open/exposed_turf, reac_volume)
@@ -126,7 +126,7 @@
 		return
 	var/temp = holder ? holder.chem_temp : T20C
 	if(temp >= LIQUID_PLASMA_BP)
-		exposed_turf.atmos_spawn_air("plasma=[reac_volume];TEMP=[temp]")
+		exposed_turf.atmos_spawn_air("[GAS_PLASMA]=[reac_volume];[TURF_TEMPERATURE(temp)]")
 	return ..()
 
 #undef LIQUID_PLASMA_BP
diff --git a/code/modules/reagents/chemistry/recipes/others.dm b/code/modules/reagents/chemistry/recipes/others.dm
index 20af933b404..2fb4bc9ce26 100644
--- a/code/modules/reagents/chemistry/recipes/others.dm
+++ b/code/modules/reagents/chemistry/recipes/others.dm
@@ -156,7 +156,7 @@
 	var/turf/exposed_turf = get_turf(holder.my_atom)
 	if(!exposed_turf)
 		return
-	exposed_turf.atmos_spawn_air("n2o=[equilibrium.step_target_vol/2];TEMP=[holder.chem_temp]")
+	exposed_turf.atmos_spawn_air("[GAS_N2O]=[equilibrium.step_target_vol/2];[TURF_TEMPERATURE(holder.chem_temp)]")
 	clear_products(holder, equilibrium.step_target_vol)
 
 /datum/chemical_reaction/nitrous_oxide/overheated(datum/reagents/holder, datum/equilibrium/equilibrium, step_volume_added)
diff --git a/code/modules/reagents/chemistry/recipes/pyrotechnics.dm b/code/modules/reagents/chemistry/recipes/pyrotechnics.dm
index e0b8c74f75a..4894c3d4faf 100644
--- a/code/modules/reagents/chemistry/recipes/pyrotechnics.dm
+++ b/code/modules/reagents/chemistry/recipes/pyrotechnics.dm
@@ -395,7 +395,7 @@
 		return
 	var/turf/open/T = get_turf(holder.my_atom)
 	if(istype(T))
-		T.atmos_spawn_air("plasma=[created_volume];TEMP=1000")
+		T.atmos_spawn_air("[GAS_PLASMA]=[created_volume];[TURF_TEMPERATURE(1000)]")
 	holder.clear_reagents()
 	return
 
@@ -579,8 +579,8 @@
 	var/range = clamp(sqrt(created_volume*2), 1, 6)
 	//This first throws people away and then it explodes
 	goonchem_vortex(turfie, 1, range)
-	turfie.atmos_spawn_air("o2=[created_volume/2];TEMP=[575]")
-	turfie.atmos_spawn_air("n2=[created_volume/2];TEMP=[575]")
+	turfie.atmos_spawn_air("[GAS_O2]=[created_volume/2];[TURF_TEMPERATURE(575)]")
+	turfie.atmos_spawn_air("[GAS_N2]=[created_volume/2];[TURF_TEMPERATURE(575)]")
 	return ..()
 
 /datum/chemical_reaction/firefighting_foam
diff --git a/code/modules/reagents/chemistry/recipes/slime_extracts.dm b/code/modules/reagents/chemistry/recipes/slime_extracts.dm
index 012655eec4d..5dc9fed83ce 100644
--- a/code/modules/reagents/chemistry/recipes/slime_extracts.dm
+++ b/code/modules/reagents/chemistry/recipes/slime_extracts.dm
@@ -205,7 +205,7 @@
 		var/turf/open/T = get_turf(holder.my_atom)
 		if(istype(T))
 			var/datum/gas/gastype = /datum/gas/nitrogen
-			T.atmos_spawn_air("[initial(gastype.id)]=50;TEMP=2.7")
+			T.atmos_spawn_air("[initial(gastype.id)]=50;[TURF_TEMPERATURE(2.7)]")
 
 /datum/chemical_reaction/slime/slimefireproof
 	required_reagents = list(/datum/reagent/water = 1)
@@ -239,7 +239,7 @@
 	if(holder?.my_atom)
 		var/turf/open/T = get_turf(holder.my_atom)
 		if(istype(T))
-			T.atmos_spawn_air("plasma=50;TEMP=1000")
+			T.atmos_spawn_air("[GAS_PLASMA]=50;[TURF_TEMPERATURE(1000)]")
 
 
 /datum/chemical_reaction/slime/slimesmoke
diff --git a/code/modules/research/xenobiology/crossbreeding/burning.dm b/code/modules/research/xenobiology/crossbreeding/burning.dm
index 172dfc96783..a5f281bb375 100644
--- a/code/modules/research/xenobiology/crossbreeding/burning.dm
+++ b/code/modules/research/xenobiology/crossbreeding/burning.dm
@@ -111,8 +111,8 @@ Burning extracts:
 /obj/item/slimecross/burning/darkpurple/do_effect(mob/user)
 	user.visible_message(span_danger("[src] sublimates into a cloud of plasma!"))
 	var/turf/T = get_turf(user)
-	T.atmos_spawn_air("plasma=60")
-	..()
+	T.atmos_spawn_air("[GAS_PLASMA]=60")
+	return ..()
 
 /obj/item/slimecross/burning/darkblue
 	colour = "dark blue"
diff --git a/code/modules/research/xenobiology/xenobiology.dm b/code/modules/research/xenobiology/xenobiology.dm
index 8ab3b65db92..7c3465e9796 100644
--- a/code/modules/research/xenobiology/xenobiology.dm
+++ b/code/modules/research/xenobiology/xenobiology.dm
@@ -233,7 +233,7 @@
 		if(SLIME_ACTIVATE_MAJOR)
 			var/turf/open/T = get_turf(user)
 			if(istype(T))
-				T.atmos_spawn_air("plasma=20")
+				T.atmos_spawn_air("[GAS_PLASMA]=20")
 			to_chat(user, span_warning("You activate [src], and a cloud of plasma bursts out of your skin!"))
 			return 900
 
@@ -339,7 +339,7 @@
 		if(SLIME_ACTIVATE_MAJOR)
 			var/turf/open/T = get_turf(user)
 			if(istype(T))
-				T.atmos_spawn_air("nitrogen=40;TEMP=2.7")
+				T.atmos_spawn_air("[GAS_N2]=40;[TURF_TEMPERATURE(2.7)]")
 			to_chat(user, span_warning("You activate [src], and icy air bursts out of your skin!"))
 			return 900
 
@@ -572,7 +572,7 @@
 		if(SLIME_ACTIVATE_MAJOR)
 			var/turf/open/T = get_turf(user)
 			if(istype(T))
-				T.atmos_spawn_air("o2=11;n2=41;TEMP=293.15")
+				T.atmos_spawn_air("[GAS_O2]=11;[GAS_N2]=41;[TURF_TEMPERATURE(T20C)]")
 				to_chat(user, span_warning("You activate [src], and fresh air bursts out of your skin!"))
 				return 600
 
diff --git a/tgstation.dme b/tgstation.dme
index bb0e590fad0..e1870c32cfd 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -243,6 +243,7 @@
 #include "code\__DEFINES\wounds.dm"
 #include "code\__DEFINES\xenobiology.dm"
 #include "code\__DEFINES\atmospherics\atmos_core.dm"
+#include "code\__DEFINES\atmospherics\atmos_gasses.dm"
 #include "code\__DEFINES\atmospherics\atmos_helpers.dm"
 #include "code\__DEFINES\atmospherics\atmos_machinery.dm"
 #include "code\__DEFINES\atmospherics\atmos_mapping_helpers.dm"