Started ion this, not sure how to tackle it, we have the percentages …

…defined in the biomes already, so maybe it doenst even need to be a "real " compound, but i also feel like this would allow us to add more abstract things like light and heat. And have them be "compounds" with a flag like "environmental".

scripts/SimulationParameters/MicrobeStage/Compounds.json

@@ -69,5 +69,29 @@
             "g": 0.0,
             "b": 0.078
         }
+    },
+
+    "Oxygen": {
+        "name": "Oxygen",
+        "volume": 1,
+        "isCloud": false,
+        "isUseful": true,
+        "colour": {
+            "r": 0.078,
+            "g": 0.0,
+            "b": 0.078
+        }
+    },
+
+    "CarbonDioxide": {
+        "name": "Carbon Dioxide",
+        "volume": 1,
+        "isCloud": false,
+        "isUseful": true,
+        "colour": {
+            "r": 0.078,
+            "g": 0.0,
+            "b": 0.078
+        }
     }
 }