President Donald Trump is once again withdrawing the United States from the Paris climate accords, pulling the nation whose factories, cars and power plants contributed the most cumulative planet-heating pollution to the atmosphere out of the first global pact to slash carbon emissions enough to prevent the world’s average temperature from reaching dangerous new heights.

President Donald Trump said Monday he will again withdraw the United States from the landmark Paris climate agreement, dealing a blow to worldwide efforts to combat global warming and once again distancing the U.S. from its closest allies.