As of 2011,the United States had refused to ratify the Kyoto treaty to reduce greenhouse gas emissions,even though the United States is the second-largest contributor of greenhouse gases.Which county contributes the most?

Question

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According to the World Resources Institute, as of 2017, China is the largest contributor to greenhouse gas emissions, accounting for over 27% of global emissions. The United States is the second-largest contributor, responsible for around 15% of global emissions.

As of 2011,the United States Had Refused to Ratify the Kyoto