"WASHINGTON — As a businessman, President Trump was a frequent and scornful critic of the concept of climate change. In the years before running for president, he called it ‘nonexistent,’ ‘mythical’ and a ‘a total con job.’ Whenever snow fell in New York, it seemed, he would mock the idea of global warming.
‘Global warming has been proven to be a canard repeatedly over and over again,’ he wrote on Twitter in 2012. In another post later that year, he said, ‘The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive.’ A year later, he wrote that ‘global warming is a total, and very expensive, hoax!’
But on Friday, a day after Mr. Trump withdrew the United States from the Paris climate change accord, the White House refused to say whether the president still considers climate change a hoax. As other leaders around the world vowed to confront climate change without the United States, Mr. Trump’s advisers fanned out to defend his decision and, when pressed, said they did not know his view of the science underlying the debate.
‘I have not had an opportunity to have that discussion,’ said Sean Spicer, the White House press secretary."