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• a  of or relating to or produced by the effects of light on chemical systems

• From Berlin came reports of a new photochemical process for producing naturally colored cinema films at no greater expense or effort than black and white effects require.
• Both also contribute to photochemical oxidants, which are formed by the action of sunlight on hydrocarbons and nitrogen oxidants.
• A thick photochemical smog comprised of respirable suspended particulate matter and nitrogen dioxide hangs thick over the Causeway Bay district of Hong Kong, 22 January 2009 Pilot .

News & Articles

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• Singapore, Malaysia Face Economic Hit From Prolonged Smog
  Smog is a type of air pollution that is caused by the burning of large amounts of coal or release of vehicular emissions and industrial fumes – creating a dense, enveloping haze. Smog contains soot particulates, sulfur dioxide, and other components. These pollutants react in the atmosphere with sunlight and form photochemical smog. The atmospheric... Read more » Singapore, Malaysia Face Economic ...
  June 24, 2013 - The Inquisitr

Quotes

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• Jeff Celentano in Earthtimes.org
  We are pleased with the color quality of our negative, as well as our decision to print the film using a photochemical process,said Jeff Celentano, Director.