Outdoor air The use of acetaldehyde is widespread in different industries, and it may be released into waste water or the air during production, use, transportation and storage. Sources of acetaldehyde include fuel combustion emissions from stationary internal combustion engines and power plants that burn fossil fuels, wood, or trash, oil and gas extraction, refineries, cement kilns, lumber and wood mills and paper mills. Acetaldehyde is also present in automobile and diesel exhaust. As a result, acetaldehyde is "one of the most frequently found air toxics with cancer risk greater than one in a million".
Outdoor air The use of acetaldehyde is widespread in different industries and it may be released into waste water or the air during production use transportation and storage Sources of acetaldehyde include fuel combustion emissions from stationary internal combustion engines and power plants that burn fossil fuels wood or trash oil and gas extraction refineries cement kilns lumber and wood mills and paper mills Acetaldehyde is also present in automobile and diesel exhaust As a result acetaldehyde is "one of the most frequently found air toxics with cancer risk greater than one in a million"