- from Conservation
750L - 890L
Air pollution has many sources.
Indoors, it comes from aerosol sprays, paint, ordinary dust, and dander. Dander is tiny scales from animal skin or hair. Outdoors, air pollution comes from vehicle exhaust and factories. Air pollution has gotten worse and worse over the last hundred years. People are working in many ways, big and small, to conserve the quality of our air.