The deal was built on the United Nations Framework Convention on Climate Change and brought nearly every country in the world into a commitment to meet set goals on global warming.
Trump's Secretary of State Rex Tillerson also wanted America to stay on board with the deal.
The only Canadian leader who understood the importance of Canada moving in sync with the USA on carbon pricing - lest we deliberately undermine our economy - was former Conservative prime minister Stephen Harper.
The Kremlin says Russian Federation is committed to the Paris climate change accords. "It looks like that attempt failed", Juncker said.
This isn't the first time Musk has publicly opposed the Trump administration.
German Chancellor Angela Merkel, who has in the past even been dubbed the "climate chancellor" for her efforts to fight global warming, welcomed Li's remarks at their joint press conference.
Word of Trump's decision comes a day after the president met with Scott Pruitt, the administrator of the Environmental Protection Agency. Such a drastic move from Trump could weaken the Paris Agreement, as the United States is the world's second biggest carbon polluter.
Trump's influential daughter Ivanka Trump's preference is to stay, but she has made it a priority to establish a review process so her father would hear from all sides, said a senior administration official.
The official insisted on anonymity in order to discuss the decision before the official announcement. But he emphasized that's still a significant increase - especially if the goal is ultimately to hold the planet to an even more ambitious 1.5 degree Celsius, another target cited in the Paris agreement.More news: Turkey: Man detained on United States plane just wanted 1st class seat
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"Mr. Trump ... doesn't get close enough to the dossiers to fully understand them", the Commission chief said.
Chief executive Odd Arild Grefstad cited the growth of renewable energy in USA states such as Texas, New York and California as signs that "the world has started the transition from fossil to a renewable economy".
The United States committed to reduce its emissions by 26 percent to 28 percent from 2005 levels by 2025. Last year, under President Barack Obama, the US joined the Paris Agreement to combat climate change.
The U.N.'s main Twitter page quotes Secretary-General Antonio Guterres as saying: "Climate change is undeniable".
For a rare moment, climate change will be the subject in the news that everybody is watching.
The powers also "underline that tackling climate change and reforming our energy systems are significant drivers of job creation, investment opportunities and economic growth", according to the draft statement, which also emphasizes the importance of worldwide collaboration in curbing global warming.
He added he would have "no choice" but to depart Trump's advisory councils if the United States pulled out of the climate deal.
Carbon dioxide stays in the air for 100 years and about one-fifth of what's accumulated in the atmosphere over the last century came from the United States, more than any other country.
While not mentioning the U.S.by name, Chinese Foreign Ministry spokeswoman Hua Chunying tells reporters climate change is a "global challenge" that no country can ignore.
Trump swore he would end USA involvement in the treaty from the get-go, while Democratic challenger Hillary Clinton supported the Paris Accord throughout her campaign.
But Trump's chief White House economic adviser, Gary Cohn, told reporters during the trip overseas that Trump's views on climate change were "evolving" following the president's discussions with European leaders.
During his 2016 presidential campaign, Trump blasted the accord, and called global warming a hoax aimed at weakening USA industry.