Under inversion and other weather conditions, haze is a form of urban and regionalpollution, causing by aerosol.
霾在大气逆温等稳定气象条件下，由气溶胶和气体污染物造成的一种城市和区域性空气污染现象。
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Also factored out were broader variations in air quality, but "even in an area with low regionalpollution, children living near a major roadway are a increased risk of health effects."
In order to create an environmentally friendly and safe world, it is necessary for each country to set vehicular quotas and limit the permits in number to control regional air pollution.