For example, air pollution, such as sulfur dioxide. Follow the road dust. Smoke from a pipe factory and car industries. There are also smoke cigarettes, etc, which are the source of the allergy in the present.
Such as air pollution, such as sulfur dioxide. Road dust Smoke from automotive hose And from industrial plants There are also smoke, which is the source of the allergy factor in the current increase.
Such as air pollutants, such as sulfur dioxide, dust on the streets, the smoke from the vehicle's exhaust pipe and industrial also smoke cigarettes. Etc., which is a factor that is the source of the increase in allergies .