Book 25, Question 111
Where does city air pollution come from?
The main sources are vehicles, heating buildings, power plants, factories, construction dust, and wood smoke.
Some pollution is made of gases, and some is tiny particles, called fine particles, about thirty times thinner than a hair. People breathing them can have a cough or tired lungs. Using fewer vehicles and cleaner energy helps keep air healthy.
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Quick answers
Where does city air pollution come from?
Air pollution emitted from transportation contributes to smog, and to poor air quality, which has negative impacts on the health and welfare of U.S.
Source: U.S. EPA
More fun facts
- Examples of mobile source air toxics include benzene, formaldehyde, and diesel particulate matter.
- EPA programs to reduce emissions from transportation sources have resulted in less smog and soot, significantly better air quality and better health for Americans.
- Freight transportation is a large contributor to air pollution and climate change.
- Findings now emerge that emissions from common household and industrial products rival motor vehicle emissions as the top source of the city’s air pollution.
Sources: U.S. EPA, Colorado State University