President Biden has set a goal of making the U.S. carbon neutral by 2050, which will require steeper emissions cuts than the U.S. has ever achieved. To reach it, coal power would have to wane into a footnote, replaced by renewables like solar and wind.

WASHINGTON, DC – MAY 03: Workers put solar panels down during an installation May 3, 2106 in Washington, DC. The installation marked the one millionth in the U.S. in the past 40 years. It has been predicted that the U.S. will reach 2 million installations in two years. (Photo by Alex Wong/Getty Images)