When the threat of wildfires forced power shutoffs in Calistoga, California, it meant firing up dirty diesel generators.

(AP) — For residents of this quaint tourist town on the northern edge of Napa Valley ... a first-of-its-kind system that combines two clean-energy technologies — hydrogen fuel cells and ...

FOR RESIDENTS OF THIS QUAINT tourist town on the northern edge of Napa Valley, the threat of wildfire is seldom out of mind.

More than $14 billion in clean energy investments in the U.S. have been canceled or delayed this year, according to an ...