President Donald Trump is set to sign an order to greatly reduce the role climate change plays in decision making across the U.S. government, Bloomberg reported, citing a person familiar with the administration’s plan.

The order, which could be signed this week, aims to reverse former Democratic President Barack Obama‘s broad approach for addressing climate change, the report said.

The directive will urge the U.S. Environmental Protection Agency to undo the Clean Power Plan, the Bloomberg report said.