At a Glance

Trump does believe in climate change, says U.S. Ambassador Nikki Haley.It has been hard to pin down whether Trump does or does not believe in climate change.

President Donald Trump does believe in climate change and the role humans have in it, Nikki Haley, the United States ambassador to the United Nations, .

Haley made her comments for an interview on CNN's “State of the Union.” Her comments seem to partially answer a question that has been put to the president and those close to him ever since he made his announcement Thursday that the U.S. would pull out of the Paris Climate Accord.

"President Trump believes the climate is changing, and he believes pollutants are part of the equation," Haley said Saturday. She noted that Trump "knows that it's changing and that the U.S. has to be responsible for it and that's what we're going to do."

President Donald Trump gestures while speaking about the U.S. role in the Paris climate change accord, Thursday, June 1, 2017, in the Rose Garden of the White House in Washington.

(AP Photo/Pablo Martinez Monsivais)

She reiterated what Trump said during his announcement - that the U.S. will still work to curb climate change.

"Just because the U.S. got out of a club doesn't mean we aren't going to care about the environment," she said.

Trump, who once said climate change was a hoax perpetrated by the Chinese, that his administration would "begin negotiations to re-enter either the Paris accord or an entirely new transaction on terms that are fair to the United States, its businesses, its workers, its people, its taxpayers, so we're getting out, but we will start to negotiate and we will see if we can make a deal that's fair."

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It has been difficult to pin down his true beliefs on the subject. In 2015, that he was "not a believer in man-made global warming," but in November 2016, he that there was "some connectivity" between human activity and climate change.

"There is some, something," he told the NY Times. "It depends on how much. It also depends on how much it’s going to cost our companies. You have to understand, our companies are non-competitive right now."

In March 2016, Trump seemed to concede that climate was changing, but he voiced doubts that humans were involved.

"I think there's a change in weather. I am not a great believer in man-made climate change. I'm not a great believer," he . "There is certainly a change in weather," he said.

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Severe drought reveals the remains of a tree on the banks of the Madeira River near Nova Olinda do Norte, Brazil, Oct. 21, 2005. (© Daniel Beltrá, courtesy of Catherine Edelman Gallery, Chicago )