Eight of the nation's 10 smoggiest cities are in California, despite tough vehicle emission requirements and pollution control efforts.

There was light here, but it was dim and orange, like twilight in a smoggy city.

Houston is among the nation's most smoggy cities, and the release of toxins into waterways is a growing problem.

Mr. Guild tells of 1.8 billion people trapped in smoggy cities.

But the women express the same excitement, in almost the same words, about having come even to a grimy, smoggy city like Dongguan.

The law calls for cleaner-burning gasoline in the nine smoggiest cities by 1995.

Houston's just become the smoggiest city in the country and Texas is No. 1 in industrial pollution.

In the long run, this means more pollution in our smoggy cities.

Houston just solidified its title as the smoggiest city.

Waiving one requirement was a purely political move that would do nothing to reduce pollution from vapors in less smoggy cities, they said.