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                                    Which gas contributes green house effect the most on the earth | 
                            
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Answer»  Answer: Carbon DIOXIDE Global Warming POTENTIAL (100-year): 1 Carbon dioxide (CO2) is the PRIMARY greenhouse gas EMITTED through human activities. In 2019, CO2 accounted for about 80 percent of all U.S. greenhouse gas emissions from human activities. Explanation:  | 
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