The North American Council for Freight Efficiency has concluded that hydrogen will be a factor in long-distance heavy-duty trucking.

Combustion without pollution? A hybrid diesel engine could be a contender as the best technology for heavy long-distance trucking.

Leaders from the three West Coast states and the Canadian province of British Columbia signed an agreement pledging to cooperate on climate change measures.

Growth in the number of hydrogen fueling stations accelerated in California, but the state is likely a year behind on its 100-station goal.