The European Commission president on Wednesday said that it was the "duty of Europe" to stand up to the USA if President Donald Trump decides to pull his country out of the Paris climate change accord.
During Trump's overseas trip last week, European leaders pressed him to keep the U.S.in the pact.
Brian Deese, who was President Obama's point person on the Paris accord, says it's not just about the environment - it's about the economy.
Although individual states can not sign the Paris accord, Brown said state leaders should step up to demonstrate the nations support if Trump pulls out of the coordinated response to global warming.
Charlie Crist says the idea of President Donald Trump pulling the US out of the Paris climate accords would be "shortsighted, irresponsible, and immoral".
Chinese Premier Li Keqiang will arrive in Brussels late Thursday for talks with EU president Donald Tusk and European Commission head Jean-Claude Juncker, with climate change at the top of the agenda.
Trump has said he will announce his decision on the climate deal later Thursday.
Silicon Valley has had a complicated relationship with the Trump White House in its early months.
The Paris climate agreement was established during a 2015 conference in the French capital.
"We need a framework like that to address the challenge of climate change, the risk of climate change", Darren Woods, CEO of Exxon Mobil, said Wednesday. "So he knows that in the USA there's very strong opinions on both sides but he also knows that Paris has important meaning to numerous European leaders".
In signing onto the accord, countries pledged to reduce greenhouse gas emissions, but were given wide leeway in how much they planned to reduce them by.
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If Trump withdraws, Graham said, "it means that the leader of the Republican Party is in a different spot than the rest of the world".
The US is now one of the largest emitters of carbon dioxide in the world.
State and religious leaders have expressed desire for Trump to continue US participation in the agreement.
A senior European Union official told reporters the EU and China will reaffirm their commitment to the Paris accord this week regardless of Trump's decision.
UN Ambassador Nikki Haley told MSNBC on Tuesday that although she wouldn't share them publicly, "I do have views and I have expressed those to the administration and we'll see where it comes out".
Even in regions of the US where coal is plentiful, electric utilities are increasingly shifting to cheaper, cleaner-burning natural gas.
Advocates of the climate deal pressured Trump, who has changed his mind on large decisions before even after signaling a move in the opposite direction. In it the USA had agreed to reduce its emissions by 26 percent by 2025 when compared to levels in 2005 - about 1.6 billion tons.
"You know that President (Vladimir) Putin signed this convention, Russian Federation pays a lot of attention (to that)", Peskov said.
"Yesterday, the United Nations chief said even if Trump decides to leave the deal, "its very important for the USA society as a whole? the cities, the states, the companies, the businesses? to remain engaged" with the agreement".
"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", the founder of electric carmaker Tesla and the private space exploration firm SpaceX tweeted.