The Environmental Protection Agency has noted that airborne exposure to asbestos may occur through the erosion of natural deposits in asbestos-bearing rocks, from a variety of asbestos-related industries, and from clutches and brakes on cars and trucks. The concentrations in outdoor air are highly variable. Asbestos has also been detected in indoor air where it was released from a variety of building materials such as insulation, wall texture, and ceiling and floor tiles.
The EPA also notes that asbestos may be released to water from a number of sources, including erosion of natural deposits, corrosion from asbestos-cement pipes, and disintegration of asbestos roofing materials with subsequent transport into water drains.
There are several studies which confirm the presence of asbestos disease in those who live near an asbestos mine, or in the vicinity of a factory where asbestos materials were made.
