If Mr Trump withdraws from Paris, it will hardly come as a surprise, and so far countries are holding the line.
During his campaign, Trump vowed to "cancel" USA participation in the deal. But he indicated that was hardly a priority. "If we can, great".
The US would end the implementation of its voluntary commitments under the Paris Agreement to cut greenhouse gas emissions by 26% to 28% by 2025 compared with 2005 levels, and its contribution to climate finance, he said. This is not, after all, a president given to poring over data and scientific evidence before making a decision. Calculations suggest withdrawal could release up to 3 billion additional tons of carbon dioxide a year - enough to melt ice sheets faster, raise seas higher and trigger more extreme weather.
When asked about whether China has spoken to the Trump administration about the climate agreement, she said, "China and the United States have close communications about a wide variety of topics, and of course, this includes the issue of climate change".
Abandoning the pact was one of Trump's principal campaign pledges, but America's allies have expressed alarm about the likely consequences.
The U.S.is the second worst emitter of carbon dioxide in the world, according to the European Commission's emissions database, behind only China. It puts the U.S.in a very small camp; the only other countries not part of the agreement are Syria and Nicaragua.
Johnson told Sky News that Britain still wants the U.S.to take the lead in fighting climate change and called on individual USA states to keep making progress on that front.
"Leaving the Paris agreement would damage relationships with our allies and weaken American leadership on the global stage", they wrote in a letter to Trump.
The topline goal is to limit global temperature increase to less than 2 degrees Celsius, with a focus on keeping it to 1.5 degrees or less.
Moscow also called on Trump to cooperate. "And the program is renewable energy, decarbonizing, and research and development in a way that makes America more sustainable, not less".
From among his critics, U.S. Sens.
The immediate impact of Trump's move could be largely symbolic.
"The administration just hasn't been responding to us to see if they're interested in working on bringing folks here", Walsh said at a City Hall news conference, held amid reports that President Trump may be poised to abandon the landmark climate agreement.
Most Americans want the U.S.to stay in the Paris climate accord.
But with a Republican-dominated Senate back home, he could do only so much. During Trump's speech, the faint sounds of protesters could be heard in the distance banging drums. The Times reported this possibility: "Sending the Paris agreement to the Senate for ratification as a treaty". Aides have been deliberating on "caveats in the language", one official said. Withdrawal would take effect a year after notification, which can be given at any moment. 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.
Here is a brief history of America's chequered involvement in the two-decade-old process that yielded the 2015 Paris accord endorsed by 196 nations - the first universal pact on curbing global warming. But Trump's statement was clear and direct.
Building suspense about America's role in the world, President Donald Trump planned to announce Thursday whether the USA would stay in a global climate pact.
Ten tips that help to win
Tip # 2 You need to find out as much information as you can on the online casino before you will give away your money. Unlikely you will want to swim in the dark pond if you have no idea what is waiting for you below the surface.
Putin: Russian state has never been involved in hacking
We aren't planning to be involved in it. "The US, do you have (close relations)?", he said , speaking through an interpreter. The two countries are planning to jointly develop the contested islands while keeping them under Russian administration.
Apple says payouts from App Store total $70 bn
That might be the best news yet for companies that have worked to convince smartphone users to pay for content on their phones. With today's announcement, Apple is keen to show that it's continuing to yield benefits to app makers and publishers.