Question: Gases that trap heat in the atmosphere are called greenhouse gases. What are the main gases considered to be “greenhouse gases”?
Answer: The main gases considered to be “greenhouse gases” are carbon dioxide CO2), methane, nitrous oxide and the fluorinated gases (hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride) (https://www.epa.gov/ghgemissions/overview-greenhouse-gases; accessed; January 2017)
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