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11 cards from this deck
Approx. 200 million years
Almost 80%
About 20%
Nitrogen (N2N_2N2)
Crucial for respiration
Gases present in < 1% proportion
H2OH_2OH2O, CO2CO_2CO2, noble gases (e.g., argon)
Climate regulation
Maintain the greenhouse effect
Relatively stable for ~200 million years
Support chemical reactions in environment
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