Acting Environmental Protection Agency (EPA) chief Andrew Wheeler on Wednesday downplayed last year's dire federal government report on climate change, saying some of the report's conclusions "were based on the worst-case scenario."

"Some of the conclusions were based on the worst-case scenario. ... And so, I’m trying to take the report as a whole. I’ve had briefings by my career staff, here at the agency, which I depend upon," Wheeler told ABC News.

EXCLUSIVE: Acting EPA Administrator Andrew Wheeler tells @ABC News “we are moving forward on climate change,” and says some conclusions of recent dire climate change report “are based on the worst-case scenario.” https://t.co/xEwEWOvLy6 pic.twitter.com/lRrMnQteFz — ABC News (@ABC) February 13, 2019

The report, released in November, warned that efforts to counter climate change were insufficient and found that climate change posed significant threats to public health, the American economy and the environment.

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President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE dismissed the report, saying in November that he didn't "believe" its findings. Trump has frequently suggested that man-made climate change is not real, often calling it a "hoax."

Wheeler told ABC News that, in criticizing the report, Trump was referring to the media coverage of the assessment.

“I think what President Trump in particular is referring to was the media coverage of the climate assessment, and the fact that the media focused on the worst case scenario and a few other aspects that really weren’t in that report. But we are moving forward on CO2, and we are moving forward on climate change," Wheeler said.