Greenhouse Effect

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…to reduce worldwide emissions of greenhouse gases. The agreement, known as the Kyoto Protocol, obligates 38 industrialized nations to reduce emissions of six greenhouse gases. Specifically, by 2012, emissions must be at an average of about 5 percent below the level of 1990 emissions. The United States, which is responsible for 20 percent of the total global emissions, pledged to reduce its emissions to 7 percent below 1990 levels, while the European Union pledged to reduce its emissions to 8 percent below 1990 levels.