Can be fatal in high concentrations. Difficult to control. Wood-burning stoves, construction, farming, industry, forest fires, mining and volcanoes. Compounds throat, heart and respiratory problems. Can carry compounds and heavy metals into lungs.
Automobiles are a major source of air pollution.
Avoid unnecessary driving and idling. Be careful not to spill gasoline when refueling. Bicycle, walk or take public transportation. Driving just 25 miles adds about one pound of pollution to the atmosphere. While visiting a national park, do not have a campfire.