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→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.
: [[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]].
===Human effects on the Atmosphere===
: The equilibrium of [[gas]]es has been affected by [[combustion]] and other industrial processes caused by [[human]]s.
: Before the industrial revolution the amount of [[Carbon Dioxide]] in the '''atmosphere''' was 0.02%. Since then, due to the [[combustion]] of [[Fossil Fuel|fossil fuels]] it has increased to 0.04% which [[scientist]]s believe is causing the [[Mean Average|average]] global [[temperature]] to increase.