With 7 of its ambitious rules for cars, trucks and trains repealed, California officials must find new ways to clean up the ...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

In Southern California, large warehouses must take steps to reduce the pollution caused by truck visits, either by switching ...

A new real-time monitoring system captures minute-by-minute changes in toxic metals resulting from traffic pollution.

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

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

The ongoing debate in Delhi about vehicle pollution intensifies as experts question the effectiveness of the CAQM directive that targets older vehicles. Can better fuel and emission standards, rather ...

The Delhi Government's ban on refuelling end-of-life vehicles emphasises the serious threat that older vehicles pose to air ...

Delhi’s air pollution is a complex, multi-source problem, with major contributors including construction dust, industrial ...