A landmark agreement, ratified by 147 parties or countries, the Paris Agreement on Climate Change was aimed at cutting emissions and keeping global temperatures from rising more than 2 degrees Celsius above pre-industrial levels.
The president's decision makes US one of three countries that have not signed on - the other two are Syria and Nicaragua. "Apparently the White House has no understanding of how an worldwide treaty works".
"Canada wants to create good jobs, and wants to grow our economy and create opportunities for business". China and Europe have become world leaders on the path towards green development already and will strengthen their position if the U.S. slips back at the national level. They are going forward; we are going backward.
The summit is taking place days after German Chancellor Angela Merkel-who will meet with the Chinese premier in Berlin on Thursday morning-gave her strongest indication that Europe and the USA are drifting apart. The U.S., he said, is "well positioned to compete" with the agreement in place and staying in means "a seat at the negotiating table to ensure a level playing field".
Fox, who has clashed with Trump since last year's presidential campaign, said the USA leader's decision "condemns this generation and those to come" and would leave "a dark legacy just to satisfy your greediness". "If we can't, that's fine".
Scientists say Earth is likely to reach more unsafe levels of warming sooner as a result of the president's decision because America contributes so much to rising temperatures. 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.
"One of the things President Trump has been trying to signal is that America will always look out for its own interests first and perhaps he's making the statement that some of these agreements may not be in the best interests of some American businesses".
Climate action will also continue in the USA even if Washington withdraws.
Already, the United States employs more people in solar energy (nearly 374,000) than in coal (a little over 160,000), according to the U.S. Department of Energy. He said, "I do respect this decision but I do think it is an actual mistake both for the USA and for our planet".More news: Trump expected to leave climate deal
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China is the top emitter of carbon dioxide and the United States is second.
The deal's supporters say there is little upside for businesses if the USA withdraws, and a lot of risks. "This agreement will help delay or avoid some of the worse consequences of climate change, will help other nations ratchet down their emissions over time".
"It's more important than ever to take action". The U.S. only sources about 13 percent of its electricity from renewables.
President Emmanuel Macron of France repeated that belief in an English-language speech from the presidential palace, unprecedented from a French president in an address at home.
At a two-day summit that begins in Brussels on Thursday, China and the European Union will commit to free trade and the Paris climate pact in a sweeping rejection of Trump's policies.
Painful though it may be for the agreement's supporters, acknowledging that it isn't flawless must also be part of the response to this proposal to renegotiate the USA terms of participation. After a typically stream-of-consciousness series of tweets on the subject, most suffixed with the former reality TV star's "MAKE AMERICA GREAT AGAIN" slogan, as well as his "global warming is a Chinese hoax" tweet from a few years ago, speculation has been rife that Trump will pull the USA out of the binding, multilateral climate initiative.
"Withdrawing from the Paris agreement will result in the USA becoming isolated on the global stage", Marshall said. And a diminished USA role in research and development will mean opportunities elsewhere, he added.
Trump promoted his announcement Wednesday night on Twitter, after a day in which USA allies around the world sounded alarms about the likely consequences of a US withdrawal. Apple did not immediately respond to a request for comment, but it has been a vocal supporter of the Paris agreement.