11.   Last month, a federal appeals court upheld regulations drafted during the Clinton administration to limit pollution from trucks and buses.

12.   To meet that goal, the state has required cleaner gas, tougher car inspections and measures limiting pollution from power plants and other sources.

13.   Proponents of higher standards say in addition to conserving fuel they limit air pollution by forcing automakers to develop cleaner technology.

14.   But the latter two cities certainly appear to be making greater efforts to limit pollution than most of the great cities of China.

15.   MTBE has been used in gasoline for two decades to limit air pollution.

16.   The program aims to get countries working together on projects of mutual benefit, such as building gas pipelines and roads, and limiting pollution from burning of coal.

17.   Those two regions fared worst in part because of the reformulated gasoline they rely on to limit pollution, Lundberg said.

18.   Those two regions fared worst in part because of the reformulated gasoline they rely on to limit pollution.

19.   One proposal is that, to limit pollution, petrol for vehicles in the nine largest cities will contain less oil and include non-pollutant additives.

20.   The ministers were due to adopt Friday a final declaration establishing new targets to limit pollution from toxic and radioactive materials, fertilizers and maritime traffic.