Zero-Pollution Buses Emerge With Backing From Silicon Valley

Buses that neither belch pollution nor draw on coal power are starting to appear on city streets, with the support of Silicon Valley and a company backed by Warren Buffett.

Over the next six months, Seattle is rolling out two all-electric buses made by Kleiner Perkins-backed Proterra Inc. The city gets 95 percent of its electricity from renewables, mostly hydroelectric dams that don’t use fossil fuels. So charging the fleet won’t increase emissions.