Industrial Source 1 : Any of a large number of sources - such as manufacturing operations, oil and gas refineries, food processing plants and energy generating facilities - that emit substances into the atmosphere
California Air Resources Board ARB (California Environmental Protection Agency), glossary of air pollution terms, Sacramento, CA, USA 2013. http://www.arb.ca.gov/html/gloss.htm, (Air Pollut - Amer) {594}