Heat pumps use little electricity, yet are able to heat and cool buildings. Since they often replace oil or gas furnaces that add greenhouse gases to the air, they can meaningfully address climate change.

By Isabella O'Malley, Associated Press

U.S. emissions fell during the height of the pandemic as people were stuck at home, but that changed as the pandemic eased. Many researchers, scientists and lawmakers argue that Americans need to reduce their use of fossil fuels much sooner…

By Miles O'Brien, Will Toubman