Final answer:
Air pollution comes from various sources, such as factories, fossil fuel burning in power plants and vehicles, ranching, and chemical use.
Step-by-step explanation:
Air pollution comes from many sources, including waste expelled into the atmosphere by numerous factories. The burning of fossil fuels is the major cause of outdoor air pollution. Power plants, motor vehicles, and home furnaces all burn fossil fuels and contribute to the problem. Other sources of air pollution include ranching, chemical use, soil erosion, and fumes from building materials, furniture, carpets, and paint.