With 7 of its ambitious rules for cars, trucks and trains repealed, California officials must find new ways to clean up the ...

Public Investigator asked the Department of Transportation why tests are still required, and what options exist for people ...

A discussion of the Clean Air Act (CAA), its amendments, and significant caselaw pertaining to clean air regulation in the US ...

More targeted action against specific categories of polluting vehicles would produce better results, and cause less confusion ...

A Pollution Under Control (PUC) certificate, recognised as a legal indicator of emissions compliance, should carry weight in ...

Electric cars are increasingly common due to their potential environmental benefits, but a new study suggests that high ...

Air quality has improved or remained steady across New York City since congestion pricing launched, city health department ...

The debate among scientists and environment policy experts over what really drives vehicle pollution has heated up in Delhi ...