The following letter, signed by more than 800 Earth science and energy experts across 46 U.S. states, urges President-Elect Donald Trump to take six key steps to address climate change to help protect “America’s economy, national security, and public health and safety.”

To President-elect Trump

We, the undersigned, urge you to take immediate and sustained action against human-caused climate change. We write as concerned individuals, united in recognizing that the science is unequivocal and America must respond.

Climate change threatens America’s economy, national security, and public health and safety^1-4. Some communities are already experiencing its impacts, with low-income and minority groups disproportionately affected.