What has the head of the American Environmental Protection Agency (EPA) said about carbon dioxide and global warming?
He has said carbon dioxide is not a primary contributor to global warming. He told CNBC: "I think that measuring with precision human activity on the climate is something very challenging to do and there's tremendous disagreement about the degree of impact, so no, I would not agree that it's a primary contributor to the global warming that we see."
Pruitt was appointed by President Trump to be head of the US Environmental Protection Agency in January 2017.
How did the Australian Prime Minister Malcolm Turnbull mock Donald Trump, comments which were recorded now released to the media?