In his first six months back in the Oval Office, President Trump rolled back decades of U.S. climate policy.

So far, he's scaled back regulations that help keep our air and water clean, delayed critical protections for endangered species, withdrawn the U.S. from the Paris Climate Agreement for a second time, and cut staffing and federal spending on critical environmental agencies and programs – among other changes.

Trump's commitment to increase oil and gas production will escalate the effects we're already seeing from global warming as humans continue to burn fossil fuels.

We discuss what changes to U.S. environmental policy could have the greatest impact on the fight to curb climate change.

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