Dust covers a wide range of pollutants - road dust, diesel soot, ash, wood smoke, nitrates in fertilizers, sulfate aerosols, lead, arsenic, etc. The main source of particulate emissions is the burning of fossil fuels like coal, gasoline and wood. Air pollution from burning coal in power tools is the dominant cause of smog, deadly soot, global warming, pollution in our national parks, toxic contamination of fish and polluted estuaries.
The proposed restriction on the federal "average" of 50 micrograms of "particles" per unit volume of air (on a scale of one year) is considered poor air quality. It is proved that the maximum daily, contributing to the average of the year, may have a significant impact on human health. The elderly and people with heart problems, lung problems or asthma are most at risk. The exact impact of air quality on health is not exactly known, but the long-term exposure to particles can increase susceptibility to infection. People with chronic lung or heart disease, may also strengthen the conditions. forecast daily pollution monitoring may be useful for people suffering from chronic diseases, in addition to the exposure may be limited to bad days. See the health effects of air pollution