19,916
edits
Changes
→Equilibrium of the Earth's Atmosphere
===Equilibrium of the Earth's Atmosphere===
: The amount of different [[gas]]es in the '''atmosphere''' have remained roughly the same for the last 3 million years due to a balance of processes which either add [[gas]]es to the '''atmosphere''' or remove it, including the [[Carbon Cycle|carbon cycle]] and the [[Nitrogen Cycle|nitrogen cycle (higher tier)]].
: [[Carbon Dioxide]] is constantly produced by [[volcano]]es, [[combustion]] and [[respiration]], but it is removed from the [[atmosphere]] by [[photosynthesis]] and [[dissolve|dissolving]] in the [[ocean]].
: [[Oxygen]] is constantly produced by [[photosynthesis]] but removed by [[combustion]] and [[respiration]].