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→Photosynthesis and the Atmosphere
===Photosynthesis and the Atmosphere===
[[Photosynthesis]] removes [[Carbon Dioxide]] from the [[atmosphere]] and adds [[oxygen]] to the [[atmosphere]].
The [[atmosphere]] usually has these concentrations of gases:
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|[[File:AtmosphericGases.png|center|300px]]
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All living creatures [[respiration|respire]] and produce [[Carbon Dioxide]]. If there was no [[photosynthesis]] the amount of [[Carbon Dioxide]] in the [[atmosphere]] would increase and the amount of [[Oxygen]] in the [[atmosphere]] would decrease.
Before humans started [[Combustion|burning]] [[Fossil Fuel|fossil fuels]] [[photosynthesis]] and [[respiration]] kept the amount of [[Carbon Dioxide]] in the [[atmosphere]] constant but now that we burn [[Fossil Fuel|fossil fuels]] the amount of [[Carbon Dioxide]] is increasing.
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|[[File:CarbonCycle.png|center|400px]]
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| style="height:20px; width:200px; text-align:center;" |This [[diagram]] shows [[Carbon Cycle]] which shows how [[photosynthesis]] takes [[Carbon Dioxide]] out of the [[atmosphere]].
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