Large crowds gather to watch as dairy cows are released into open fields for the lush summer pastures, freed from the stables which have been their homes for the long winter months, in Drottningholm, Sweden, Saturday, April 29, 2017. The annual event, known in Sweden as "koslapp" or cow release, has become a popular family outing for many urban dwellers. President Donald Trump said the United States “will continue to be the cleanest and most environmentally friendly country on Earth” as he announced pulling out of an international accord designed to curb climate change. But facts muddy that claim. Data show 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. (AP Photo/David Keyton)
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