US President Donald Trump has accused climate change scientists of having a "political agenda" as he cast doubt on whether humans were responsible for the earth's rising temperatures.
But Mr Trump also said he no longer believed climate change was a hoax.
The comments, made during an interview with CBS's 60 Minutes, come less than a week after climate scientists issued a final call to halt rising temperatures.
The world's leading scientists agree that climate change is human-induced.
Last week's report by the Intergovernmental Panel on Climate Change (IPCC) - the leading international body evaluating climate change - warned the world was heading towards a temperature rise of 3C.
Scientists say that natural fluctuations in temperature are being exacerbated by human activity - which has caused approximately 1C of global warming above pre-industrial levels.
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The report said keeping to the preferred target of 1.5C above pre-industrial levels will mean "rapid, far-reaching and unprecedented changes in all aspects of society".
Climate change was just one issue touched on during the wide-ranging interview, during which Mr Trump also:
During Sunday's interview, Mr Trump cast doubt on making any changes, saying the scientists "have a very big political agenda".
"I don't think it's a hoax, I think there's probably a difference," he told journalist Lesley Stahl.
"But I don't know that it's manmade. I will say this. I don't want to give trillions and trillions of dollars. I don't want to lose millions and millions of jobs. I don't want to be put at a disadvantage."
Mr Trump added that temperatures "could very well go back" - although he did not say how.