Hydrogen will likely remain a niche technology among cars, pickups, and SUVs, but like diesel has been an alternative to gas, ...

In letters to the PUC, Amazon said its diesel generators would run fewer than 15 hours a year for testing and maintenance, ...

the company plans to add more than 400 pollution-emitting diesel generators as backups in case of glitches in the flow of electricity to one of the biggest users of power in the state, regulatory ...