<|im_start|>user
What are the most abundant greenhouse gases in Earth's atmosphere<|im_end|>
<|im_start|>assistant
The most abundant greenhouse gases in Earth's atmosphere, listed in decreasing order:

Water vapor
Carbon dioxide
Methane
Nitrous oxide
Ozone
Chlorofluorocarbons
Hydrofluorocarbons
Perfluorocarbons<|im_end|>
