US President Donald Trump will pull the US from the Paris climate agreement, CBS News reports.
Mr Trump, who has previously claimed climate change is a Chinese hoax, is expected to make the formal announcement in the coming days.
CBS News however says the President has already made his mind up, telling "close friends and confidants of his plans".
It could take years for the US to extract itself from the agreement, which was signed by 195 countries in the French capital in December 2015. It aims to keep emissions to a level which doesn't result in catastrophic warming of the planet, which could lead to rising sea levels and extreme weather events.
Mr Trump's latest public statement on the agreement was made on Twitter, where he said his decision would be announced soon, accompanied by his campaign slogan, "MAKE AMERICA GREAT AGAIN!'"
The only other two countries not to back the Paris agreement are Syria, which has spent years in civil war, and Nicaragua.
If Mr Trump does pull the US out, he will lose the backing of tech billionaire Elon Musk, who is a member of his advisory council.
"Don't know which way Paris will go, but I've done all I can to advise directly to POTUS, through others in WH & via councils, that we remain," Mr Musk tweeted.
On being asked what he'd do if Mr Trump quit Paris, he said he would "have no choice but to depart".
"Advisory councils simply provide advice and attending does not mean that I agree with actions by the administration," Mr Musk said in February.