U.S. withdrawal from the world's primary climate pact will have a bigger impact - in the U.S. and globally - than the country's first retreat in 2017, analysts and diplomats told Reuters. One of President Donald Trump's first acts on returning to office on Monday was to quit the Paris Agreement as part of his plans to halt U.

President Donald Trump ordered the U.S. to withdraw from the Paris climate agreement on Monday, once again placing the world's top historic emitter of greenhouse gases outside the global pact aimed at pushing nations to tackle climate change.