“Aside from provoking a large-scale nuclear war, it is hard to imagine an American president taking an action more harmful to the U.S. than Trump’s effort to accelerate greenhouse gas emissions”

President Donald Trump on Tuesday set about aggressively dismantling Obama-era climate policies with an executive order decried as “sheer reckless folly,” which will increase U.S. greenhouse gas emissions and accelerate the climate crisis.

“Aside from provoking a large-scale nuclear war, it is hard to imagine an American president taking an action more harmful to the U.S. than Trump’s effort to accelerate greenhouse gas emissions,” said David J. Arkush, managing director of Public Citizen’s Climate Program, in a statement.

“This day may be remembered as a low point in human history—a time when the world’s preeminent power could have led the world to a better future but instead moved decisively toward catastrophe,” Arkush added.

The order instructs the Environmental Protection Agency (EPA) to rewrite former President Barack Obama’s Clean Power Plan (CPP), which would have limited the emissions of coal-powered power plants. It also lifts the moratorium on federal coal leasing, repeals limits on methane emissions from fracking, and directs the agency to reconsider the Social Cost of Carbon and the National Environmental Policy Act guidance on greenhouse gas emissions.

“The EPA’s rollback of basic environmental rules demonstrates that when it comes to the health of our children, our communities, and our climate, this is an administration of lawlessness and disorder,” said Elizabeth Yeampierre, executive director of the grassroots sustainability group UPROSE, in statement.