Electric vehicles are seen as at least part of the solution for improving air quality.

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The hospitality industry is opposed to a complete ban in the north, saying it is already improving air quality in pubs and bars.

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The majority of the pollution is caused by vehicles on the road and experts say reducing traffic in the cities is the best way of improving air quality.

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Mr. PATRICK CUMMINS (Western Regional Air Partnership): The states in the West, in particular, have demonstrated their commitment to improving air quality over our national parks and wilderness areas.

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The design also includes a series of a series of "earth lobbies" that would store plants and trees with the intention of improving air-quality and, no doubt, the gloomy subterranean landscape.

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The good news is that most metros and counties around the country have been improving their air quality, thanks in part to support from the EPA and the implementation, albeit slow, of the 1990 Clean Air Act.

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"How to reduce the emissions from pollution sources is of paramount importance for improving our ever deteriorating air quality, " he says.

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They say air quality is improving, thanks to tighter emissions standards for motor-vehicles and to the moving of one the city's biggest polluters, a steel plant in the western suburbs, to an offshore island.

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Sullivan said it's important to note that overall air quality in the Northeast is improving as natural gas replaces coal in power plants.

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