There's been considerable debate among advocates of battery-electric and hydrogen fuel-cell cars over which technology is better for the environment. While neither vehicle type produces any tailpipe emissions, their overall emissions vary depending on the fuels and processes used to generate electricity or produce hydrogen. A new study indicates... Battery-electric cars cheaper, better at cutting emissions than fuel cells: Stanford study
There's been considerable debate among advocates of battery-electric and hydrogen fuel-cell cars over which technology is better for the environment. While neither vehicle type produces any tailpipe emissions, their overall emissions vary depending on the fuels and processes used to generate electricity or produce hydrogen. A new study indicates... 
Plug-in electric cars are slowly becoming more common, but internal-combustion engines will remain a significant presence on the world's roads for decades to come yet. That means automakers will continue trying to squeeze ever-greater efficiency out of these engines, making them more complex in the process. This will almost certainly include a... 
U.S. renewable-energy generating capacity is not only growing, but it is beginning to erode coal's share of the electricity-generating mix, according to new data from the U.S. Department of Energy (DOE). The agency predicts renewable energy—particularly solar power—to continue growing. At the same time, a combination of renewable... 
China is known for having some of the most polluted air in the world. But officials in one Chinese city found a way to at least make that air appear cleaner, for awhile. Like many Chinese cities, Xi'an, the provincial capital of Shaanxi, in the northern part of the country, has air-monitoring equipment. DON'T MISS: Coal in China: huge problem for... 
Are you driving a car or a truck? The answer may be harder to determine than you think. U.S. safety and emissions regulations generally split cars and trucks into two categories, but the line between those two vehicle types has become blurred in recent years. That's thanks to the car-based crossover utility vehicle, which now represents one of the... 
Over the past few years, China has made impressive strides in renewable-energy investment. The promotion of renewable energy will only become more important as China works to meet its commitments under the recently-ratified Paris climate agreement. But the country's reliance on coal for electricity generation still poses a huge problem for these... 
The Volkswagen diesel scandal convinced European regulators to switch from laboratory emissions testing to tests that involve actual, on-road driving. This could prevent automakers from deploying "defeat device" software like the kind used by VW on laboratory tests, as well as produce results that more closely align with what consumers can expect... 
The Volkswagen diesel scandal has brought increased scrutiny on how new cars are tested for emissions and fuel economy. VW's use of "defeat device" software to cheat on laboratory emissions tests could cause regulators to put greater emphasis on on-road emissions testing. But, in Europe at least, there is some debate about which entity will... 
Electric-car mandates can be a powerful tool for reducing transportation-related emissions. California first proposed its current zero-emission vehicle mandate in December 2011, but similar mandates are only now being widely adopted elsewhere. One such policy in China is creating friction, however. DON'T MISS: Quebec passes Canada's first... 
Low gas prices and high sales of crossovers and SUVs have led critics of current U.S. emissions standards to question whether automakers can continue meeting those standards. But a new report from the Environmental Protection Agency (EPA) shows that so far, carmakers are doing just fine. The EPA's annual CO2 and Fuel Economy Trends Report compares...