What happens to Paris climate deal if the US leaves?

As the second-biggest polluter, after China, the US has a key role in tackling rising temperatures

President Donald Trump said he would announce on Thursday his decision whether to keep the US in a global pact to fight climate change, as a source close to the matter said he was preparing to pull out of the Paris accord. This could have a domino effect on the participation of other countries in limiting fossil-fuel pollution. As a presidential candidate, Trump had said he would “cancel” the Paris pact and “focus on real environmental challenges, not the phony ones we’ve been looking at”. Trump has said the accord would cost the US economy trillions of dollars without tangible