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".
He also said he and other mayors will pick up the slack on reducing carbon emissions that exacerbate climate change.
Trump's chief economic adviser, Gary Cohn, has discussed the possibility of changing the USA carbon reduction targets instead of pulling out of the deal completely.
India has made it clear that it will not pull out of the Paris Accord - billed as the great hope to stop the unprecedented rise of global warming by cutting down on carbon emissions- even if the USA does.
In the end, the president's step on Thursday was not much of a surprise, following leaks from the White House over the past days and weeks, and his strong focus on helping domestic business throughout his election campaign.
"The Paris Accord is a BAD deal for Americans, and the President's action today is keeping his campaign promise to put American workers first", the talking points read.
Trump promised during his 2016 campaign that he'd withdraw the U.S. from the deal. It also goes against pressure to remain a part of the agreement, which 195 nations are signed onto. And the actions of cities across the nation prove it. "Leaving Paris is not good for America or the world", Musk said in a Twitter post.
Pittsburgh's mayor, Democrat Bill Peduto, shot back on Twitter that his city, long the heart of the U.S. steel industry, actually embraced the Paris accord.
"It's the first major worldwide accord to address climate change that includes emissions reduction pledges from both developed and developing economies", he told AFP.More news: Most Americans think President Trump is his own worst spokesperson, poll says
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The governors say they're committed to reducing USA emissions by 26 to 28 percent from 2005 levels.
According to the CITEPA research institute, America's renewable energy sector in America employed some 800,000 people in 2016 - almost five times more than the fossil-fuel sector. Most recently, the largely Republican town of Abita Springs, Louisiana, made the commitment.
As a result, if China and Europe are to lead the world in the US' absence, not only will they have to ensure that other nations, such as Australia, do not follow the United States - and some members of the government hope they do - but they are also going to have to think creatively about measures that could force the USA to act differently at home. "Politics has nothing to do with it for me". Now there's talk of making money off the growing renewable energy industry.
The Paris accord is nonbinding by design.
The U.S. federal system endows cities with greater powers than many cities elsewhere in the world.
A year ago was the warmest since records began in the 19th century.
To highlight the vulnerability of Small Islands', the Presidency of Fiji will convene the 2017 UN Climate Change Conference (COP23) to take place in Bonn, Germany from 6 to 17 November 2017. The Paris agreement seeks to address the impacts that are already underway.
Trump's decision is considered a win for Republicans and pulls the USA - the second-largest producer of carbon dioxide - out of a almost 200-nation agreement to cut greenhouse gas emissions. New Orleans, however, is taking a different approach.
"We believe that the United States is well positioned to compete within the framework of the Paris agreement". If all USA cities with populations over 50,000 followed the ambitions of C40 cities, however, they could collectively deliver emissions reductions equivalent to 28% of city emissions, representing 36% of the total necessary to hit the US target by 2025. -China Climate Leaders Summit, which aims to promote an exchange between mayors in both countries on how to reduce local emissions.
The facts: This study was paid for by two groups that have long opposed environmental regulation, the U.S. Chamber of Commerce and the American Council for Capital Formation.