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akameagie akameagie
wrote...
Posts: 27
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6 years ago
Greenhouse gases such as carbon dioxide, methane, and nitrous oxide do not occur naturally in the atmosphere, but are only produced in significant quantities by human activities such as power generation, agriculture, land-use changes, and transportation.
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wrote...
Staff Member
6 years ago
Lucky for you, this question has already been asked. Check out this link:

https://biology-forums.com/index.php?topic=681391.0
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