Trump was hit by multiple global officials when the news broke.
She says in a statement that the landmark accord "honors our collective moral responsibility to leave future generations with a planet that is clean, healthy and sustainable".
"Climate change presents both business risks and business opportunities".
Backing out of the agreement that way would take time, but would make it easier for the United States to return to climate change negotiations if a future administration would want to, says Andrew Light, a senior fellow at the World Resources Institute and a professor at George Mason University.
Finnish Prime Minister Juha Sipila (JOO'-hah SEE'-pah-lah) says climate change won't be reversed "by closing your eyes".
"If the United States leaves the framework convention, the U.S. will become a rogue state", says Bangladeshi climate expert Saleemul Huq.
"The Trump administration can attempt to erase decades of work from scientists and federal employees on the reality of climate change, but burying your head in the sand doesn't erase the problem", Emanuel said in a press release on the creation of the website.
President Donald Trump plans to withdraw the United States from the Paris climate accord, Axios and other media outlets, citing unnamed sources, are reporting. But the president is doing his best to maintain suspense. It would reflect a major reversal of the Obama administration's efforts on climate change.More news: Rubber Match: 2017 Finals vs. 2015 and 2016 Finals
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That post includes a video link to an impassioned speech that Guterres gave on Tuesday, when he called on the world to intensify action to combat climate change. Tillerson had argued to Trump in their discussions about Paris that scrapping the agreement could damage USA negotiating power.
The Trump administration may or may not signal the mode of withdrawal if it does, in fact, announce that it will pull out of the agreement this week.
Alden Meyer, director of strategy and policy for the Union of Concerned Scientists advocacy group, said "I don't think any other countries will follow the USA out of Paris, so if he does leave, Trump will be in splendid isolation with the leaders of Syria and Nicaragua".
Trump said he'll make a final decision in the next few days whether leave the Paris Agreement. Like the other officials, that person was not authorized to describe the private discussions by name and spoke only on condition of anonymity.
The Paris climate agreement was established during a 2015 conference in the French capital.
But the official says there may be "caveats in the language" that Trump uses to announce the withdrawal - leaving open the possibility that the decision isn't final. The non-binding treaty, established during a landmark climate change summit in 2015, requires signatories to undertake "rapid reductions" in greenhouse gas emissions - which, in the case of the USA, means instituting domestic regulations that will bring economy-wide emissions to below 2005 levels over the next decade.
Democrats had been calling on Trump to stay in the agreement, with Senate Minority Leader Chuck Schumer announcing last week that 40 Democratic senators had sent the President a letter urging him to honor the United States commitment.
Trump himself said he would "cancel" the deal on the campaign trail and his campaign's energy plan included a pledge to "cancel the Paris climate agreement and stop all payments of USA tax dollars to United Nations global warming programs".