Trump's claim that US is cleanest lacks support from studies

President Donald Trump said the United States "will continue to be the cleanest and most environmentally friendly country on Earth" as he announced a U.S. pullout from an international accord designed to curb climate change.But facts muddy that claim.Data show that the U.S. is among the dirtiest countries when it comes to heat-trapping carbon pollution. One nation that has cleaner air in nearly every way is Sweden."The U.S. is well behind other countries in having the cleanest and most sustainab