The documentary filmmaker and outspoken liberal tweeted that 'historians in the near future will mark today as the day the extinction of the human race began'

He was angry about Trump gutting Obama-era environmental laws

On Tuesday Trump signed an executive order nullifying former President Obama's commitments to curb carbon dioxide pollution

'How will the historians survive?' snarked one commenter

Donald Trump will be responsible for the extinction of the human race, at least according to documentary filmmaker Michael Moore.

'Historians in the near future will mark today, March 28, 2017, as the day the extinction of human life on earth began, thanks 2 Donald Trump,' Moore wrote on Twitter.

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Moore came to this conclusion based on Trump's host of environmental regulation roll backs.

Michael Moore said on Twitter that because of Trump's anti-environmental policies, he will start the extinction of human beings

'Trump has signed orders killing all of Obama’s climate change regulations. The EPA is prohibited henceforth from focusing on climate change,' he wrote.

On Tuesday Trump signed an executive order nullifying former President Obama's commitments to curb carbon dioxide pollution, reported the New York Times.

He also directed the Environmental Protection Agency to start rolling back Obama's Clean Power Act, which would have closed hundreds of coal-fired power plants, frozen construction of new plants and concentrated on replacing them with wind and solar farms, reported the outlet.

He has called environmental regulations 'job killing.'

After Moore's hyperbolic tweet, many agreed with him, but also many began poking fun of him.

'How do the historians survive?' asked Charles CW Cooke, editor of the National Review Online.

Trump signed executive orders giving a major boost to coal miners, some of whom stood behind him as he signed - Michael Moore mused about why none of them were over 45, then tweeted a picture of a graveyard

'April 23, 1954: the day the extinction of human life on earth began as Michael Moore began depleting our food supply,' snarked Harry Khachatrian, a contributor at the Daily Wire, referring to Moore's birth date.

'I'd be happy if it's just the beginning of @MMFlint's extinction. Not really human - more like Jabba the Hut,' wrote a man named Steve.

Trump has made it clear he is not a fan of the EPA or environmental regulations

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Moore stuck to his death theme, tweeting a picture of Trump signing the executive order, surrounded by coal miners.

'Funny how the photo-op with coal miners doesn't show any miners over 45. I wonder where they are?' he asked.

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He later tweeted a picture of a graveyard.