This combination makes them ideal for service in polluted areas.

Rules take effect next month on gasoline supplied in winter to nine polluted areas.

Over the most polluted areas there has been a 30-fold increase in sulfate deposition.

It would generate more air and noise pollution to an already polluted area of West london.

In the 2000s, the province was considered to be one of the most polluted areas in China.

Many of the most polluted areas have been designated as Superfund sites.

This was largely meant to keep people from living next to polluted industrial areas.

Their offer is to clean up polluted areas rather than serve time.

Unfortunately, the Baltic is the most polluted area of marine water in the world.

This is only likely to be a problem in heavily polluted areas.