by 
Nah-Nah
ANSWERS: 2
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Although everyone puts in their own share, I'd say the worst are: the United States and China. The US produces more greenhouse gasses than the Europe. China, however, is up and coming. Their economy is booming like never before and with that, comes infrastructure. And by infrastructure, I mean coal power plants. I'm sure we'll be seeing China overtake the United States in the years to come.
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United States, China, and India (Potentially)
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