Diesel exhaust contains a wide range of toxic chemicals. In recent years there has been concern about diesel exhaust associated with schools and in communities where bus transfer stations are close to residential areas.
Diesel engines – both in trucks and in generators – are used extensively in hydraulic fracturing for natural gas. This contributes to air pollution at drilling sites. Read: Fracking Fumes: Air Pollution from
Hydraulic Fracturing Threatens Public Health and Communities