Ports "Uses defines for turf atmos"

code/modules/atmospherics/environmental/LINDA_turf_tile.dm

@@ -15,7 +15,7 @@
 
 	//used for mapping and for breathing while in walls (because that's a thing that needs to be accounted for...)
 	//string parsed by /datum/gas/proc/copy_from_turf
-	var/initial_gas_mix = "o2=22;n2=82;TEMP=293.15"
+	var/initial_gas_mix = OPENTURF_DEFAULT_ATMOS
 	//approximation of MOLES_O2STANDARD and MOLES_N2STANDARD pending byond allowing constant expressions to be embedded in constant strings
 	// If someone will place 0 of some gas there, SHIT WILL BREAK. Do not do that.
 

code/modules/awaymissions/mission_code/snowdin.dm

@@ -154,7 +154,7 @@
 //liquid plasma!!!!!!//
 
 /turf/open/floor/plasteel/dark/snowdin
-	initial_gas_mix = "o2=22;n2=82;TEMP=180"
+	initial_gas_mix = FROZEN_ATMOS
 	planetary_atmos = 1
 	temperature = 180
 

code/modules/holodeck/turfs.dm

@@ -21,7 +21,7 @@
 
 /turf/open/floor/holofloor/plating/burnmix
 	name = "burn-mix floor"
-	initial_gas_mix = "o2=2500;plasma=5000;TEMP=370"
+	initial_gas_mix = BURNMIX_ATMOS
 
 /turf/open/floor/holofloor/grass
 	gender = PLURAL