Air pollution control measures on track.

控制空气污染措施如期进行。

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Air pollution control will be expensive.

控制空气污染是要费钱的。

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Air pollution control is a long task for human beings.

控制空气污染是人类的一项长期任务。

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Air in San Diego County remains unhealthy, especially in Oceanside and Chula Vista, said Bill Brick, senior meteorologist for the Air Pollution Control District.

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Because of the smoke, ash and winds, people in affected areas were urged to be cautious and to avoid unnecessary outdoor activities, the Ventura County Air Pollution Control District said.

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Air pollution control devices were mandated on cars.

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