The real story.
U.S. Leads in Greenhouse Gas Reductions, but Some States Are Falling Behind | Article | EESI
Most developed countries have agreed to significantly reduce their emissions, and many have already made noteworthy progress. Since 2000, over 20 countries, including Denmark, Ukraine, Hungary, Ireland and France, have reduced their greenhouse gas emissions. Of these countries, most have reduced their emissions by more than 10 percent. Denmark, for example, has reduced its CO2 emissions by more than 30 percent and the United States has reduced its by about 8 percent.
United States Efforts
Although the U.S. reduction seems low percentage-wise, it translates to a total annual reduction of about 760 million metric tons since 2005, almost as much as the reduction in the European Union as a whole (770 million metric tons). For comparison, the United States has emitted 6,000 – 7,300 million metric tons of CO2 equivalent each year between 1990 and 2014. Second place in absolute emissions decline in that period goes to the United Kingdom, with a reduction of 170 million metric tons, nearly a quarter of total U.S. reductions.
The United States accounts for only about five percent of global population, but is responsible for 30 percent of global energy use and 28 percent of carbon emissions.