California has worst US air pollution: report

California has the most polluted cities in the United States, a report issued on Wednesday said, as President Donald Trump's administration seeks to force the state to weaken its vehicle emissions standards.

China fights big smog with big air purifier

China has a found a novel way to tackle its massive air pollution problem: Putting up a giant air purifier the size of an industrial smokestack in the middle of a smog-plagued city.

US targets waiver letting California steer emissions limits

Scott Pruitt, administrator of the U.S. Environmental Protection Agency, turned his sights this week on a nearly half-century-old federal waiver that allows California to pursue its own, tough tailpipe emission standards, ...

Funding renewable energy is easier than taxing carbon

It is not difficult to understand the appeal of a carbon tax. It's an elegant, straight-forward solution to the climate change crisis. The only problem with it is that it is politically infeasible in the United States and ...

Judges to rule on diesel bans in choking German cities

Judges are to rule Thursday on whether German cities can ban old diesel cars to reduce air pollution, with potentially dramatic consequences for a key industry and transport policy in Europe's largest economy.

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