A group of 25 state governors that make up the U.S. Climate Alliance and the Biden administration announced a pledge Thursday to quadruple the number of heat pumpsin U.S. homes by 2030, from 4.7 million to 20 million.
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.
Buildings account for more than 30% of global greenhouse gas emissions.
The pledge on heat pumps is a collection of state initiatives to work toward the goal of ramping down emissions to zero by 2050. Pennsylvania and seven other states, for example, will look into developing a “clean heat” standard, meaning one for how non-polluting a heater needs to be.