During his election campaign, however, Trump called global warming "a hoax" and promised to scrap the agreement and return jobs to the coal industry that is often an easy target for environmentalists. The US was meant to be one of the leading figures in the fight against climate change, which the Obama administration had already agreed to. But if the American President was to say in the coming hours that he wants to exit the Paris Accord, then it is our duty to say: 'You can't do that'.
"The Paris Agreement will continue with full force of implementation even if the United States pulls out".
"By refusing to join other nations in taking necessary steps to drastically reduce greenhouse gas emissions and mitigate climate change, the President is effectively saying: 'Let them drown, burn, and starve, '" she continued.
So just how big is the US's climate footprint?
What about the rest of the world?
Trump had previously expressed his refusal to accept the science of climate change. He has spent his first months in office working to delay and roll back federal regulations limiting greenhouse gas emissions while pledging to revive long-struggling US coal mines.
"The Paris Agreement is essential for our collective future", he said, urging civil society and businesses also to play a role. Withdrawing would leave the United States aligned only with Russian Federation among the world's industrialized economies.More news: New, lighter Lotus Elise Cup 250 revealed
More news: Cavaliers unveil new logos for 2017-18 season
More news: Corbyn builds on TV success in leaders debate
"But of course, we also hope to do this in cooperation with others", added Li, as Merkel hailed China's pledge.
Another option, said University of California, Berkeley climate scientist Zeke Hausfather, would be for Trump to withdraw from the United Nations Framework Convention on Climate Change, the treaty on which the Paris accord was based, which would take only a year.
Coal is the dirtiest of fossil fuels, accounting for more than three-quarters of carbon emissions from USA power plants despite generating less than 40 percent of the nation's electricity.
Musk followed up with a tweet saying, "Will have no choice but to depart councils" if Trump pulls out of the Paris deal backed by almost 200 other countries.
Sydney University environmental politics professor David Schlosberg told CNN that other major countries, China and India, would likely pick up the slack, leaving the U.S. politically isolated.
California has also previously said it would help pick up the slack for any backdowns by the US President on climate change.
UN Secretary General Antonio Guterres has weighed in, arguing on Tuesday that the United States should not leave the Paris Agreement.
France's ambassador to the United States, Gerard Araud, said on Twitter that the Paris agreement "doesn't infringe on U.S. sovereignty" and noted that major American corporations had supported the deal. Finland's prime minister said climate change won't be reversed by closing your eyes.