Lee Schipper, a former oil industry executive who leads a transportation and environmental study program at the World Resources Institute, said that what pushed European drivers to diesel was a tax policy that made the fuel cheaper, but buyers there tend to drive more, so they don’t save on total consumption.

Lee Schipper, a former oil industry executive who leads a transportation and environmental study program at the World Resources Institute, said that what pushed European drivers to diesel was a tax policy that made the fuel cheaper, but buyers there tend to drive more, so they don’t save on total consumption.

Developing cars powered by hydrogen will be an effective way to relieve China's gas pollution problems, experts say.

A team at Stanford University has studied the potential effects on pollution if all U.S. vehicles converted to hydrogen fuel-cell vehicles (HFCVs). The switch could prevent 3,700 to 6,400 deaths attributable to pollution in the U.S. each year, the team r