President Donald Trump is set to sign a sweeping executive order on Tuesday aimed at promoting domestic oil, coal and natural gas by reversing much of his predecessor’s efforts to address climate change — prompting warnings the action will undermine U.S. leadership on the issue.

The document lays out a broad blueprint for the Trump administration to dismantle the architecture that former President Barack Obama built to combat the phenomenon, according to details shared with Bloomberg News. Some of the changes would happen immediately, while others would take years to complete.

“He’s trying to undo more than a decade of progress in fighting climate change and protecting public health,” David Doniger, director of the climate and clean air program at the Natural Resources Defense Council, said in an email. “But nobody voted to abandon America’s leadership in climate action and the clean-energy revolution. This radical retreat will meet a great wall of opposition.”

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