A White House official said Wednesday that Trump was planning to pull out of the Paris deal, although a final decision had not been made. The United Nations Intergovernmental Panel on Climate Change, which pools scientific research from around the world, concluded that emissions caused were "extremely likely to have been the dominant cause of the observed warming since the mid-20th century" with more than 95 percent confidence.
But other top Trump advisers, including daughter Ivanka and Gary Cohn, the head of the president's National Economic Council, are said to favour staying in the treaty. For the Republican president, a withdrawal would reflect his "America First" approach to policy, unencumbered by global obligations.
Earlier yesterday, a White House official said Trump was expected to pull out of the deal, but added that there could be "caveats".
The pact was the first legally binding global deal to fight climate change.
Mr. Trump also tweeted Wednesday morning that he will have a formal announcement on the decision "over the next few days". The U.S. accounts for more than 15 percent of global emissions and is the world's second largest emitter of greenhouse gases, exceeded only by China.
US allies rallied behind the Paris accord on Wednesday.
The accord aims to limit planetary warming in part by slashing carbon dioxide and other emissions from burning of fossil fuels.
And last week, a group of 22 Republican Senators signed a letter urging the president to leave the accord because staying in it would "subject the United States to significant litigation risk" that could get in the way of fully rescinding former President Barack Obama's Clean Power Act.
Portland mayor urges U.S. officials to shut down 'alt-right' rallies
He also called on the government to block a " March Against Sharia " that is scheduled for June 10 but has not received permits. He had been seen at a Portland "free speech" rally in April, draped in an American flag and reportedly chanting racial slurs.
"Generations from now, Americans will look back at Donald Trump's decision to leave the Paris Agreement as one of the most ignorant and unsafe actions ever taken by any President", Sierra Club executive director Michael Brune said in a statement.
So just how big is the U.S.'s climate footprint?
Dozens of other companies have also supported the USA involvement in the Paris agreement.
In this weird world that we now live in, China is being held up by many as the world's leader in globalism and environmental protection.
Trump is not a supporter of strong environmental protections on the federal level, and during the presidential campaign he pledged to pull the nation out of the accord, calling climate change a hoax created by the Chinese to hurt the US economy. That promise helped rally supporters sharing his skepticism of global efforts to police US carbon emissions.
U.S. Defense Secretary Jim Mattis responded in a television interview Sunday, assuring that Trump was "wide open on this issue as he takes in the pros and cons of that accord". Beijing, however, has reaffirmed its commitment to meeting its targets under the Paris accord, recently canceling construction of about 100 coal-fired power plants and investing billions in massive wind and solar projects.
Several Democrats have spoken out against the "misguided" step saying it could potentially damage not only the environment, but also the economy. He also had to navigate a split among his advisers. More than 150 businesses in the USA already have pledged to reduce their carbon emissions, increase low-carbon investments and invest in sustainable practices.
Why is the Trump administration seeking to leave the deal? But according to a recent report from Climate Action Tracker both China and India - two nations once viewed as roadblocks in the global fight against climate change - are on track to meet that goal before the deadline.