1.   They are expected to halve pollution caused by large commercial vehicles, bringing them into line with regulations governing car exhaust emissions.

2.   Automakers dispute this, however, saying that the naturally occurring gas cannot be specifically pinned on car emissions.

3.   Both platinum and palladium are used in catalytic converters, which remove pollutants from car exhaust emissions.

4.   Cassmassi said it is harder to fight this type of pollution called particulates because the sources are so varied including everything from car emissions to dust to diesel soot.

5.   If successful, the measures -- along with recently agreed-upon limits on car emissions -- would substantially improve air quality in the Northeast, these officials say.

6.   It wants even deeper reductions in car emissions than California has proposed.

7.   So to find the true cost to the environment, he and his colleagues adjusted the statistics on car emissions collected by the Dutch government.

8.   To reduce car emissions, gas stations in Atlanta and Birmingham soon will dispense a low-sulfur fuel this season.

9.   Both standards specify the quantity of carbon monoxide, nitrous oxide and particulate matter in car emissions.