Nine of the world's largest makers of building heating and cooling equipment have signed on to support California's goal of having 6 million new electric heat pumps by 2030.

Western states produced a whirlwind of climate initiatives last year, advancing numerous bills and regulations to reach net-zero emissions by 2050.

There’s a growing consensus in the West that green hydrogen could play a key role in decarbonizing the region’s energy system, but questions still loom around exactly how the fuel will be used in that effort.