photochemical smog


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photochemical smog

n.
Air pollution produced by the action of sunlight on hydrocarbons, nitrogen oxides, and other pollutants.
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PAN is a thermally unstable secondary photochemical smog constituent, which decomposes into peroxyethanoyl radicals and NO2.
The number of measured air pollutants has expanded to include toxic substances such as benzene, which is released from both the automobile (fuel and exhaust) and industrial/commercial sources (solvent or raw material) (Vallero 2008), and formaldehyde, which is emitted directly from industrial and combustion sources and is produced indirectly through ambient formation in summertime photochemical smog.
building of cellular concrete exhibits good environmental effects in the categories: environment acidification, toxicity of airborne substances to human, photochemical smog, eco-toxicity and eutrophisation; and worse properties as regards: the greenhouse effect, ozone reduction, primary energy consumption, toxicity of substances contained in water to human, utilisation of minerals, water consumption, waste and transport,
KITAKYUSHU, Japan - A photochemical smog warning issued in Kitakyushu, Fukuoka Prefecture on Sunday forced 85 elementary schools in the city to postpone their planned athletic meets.
The recipe for photochemical smog includes a list of noxious substances with long chemical names.
c) Urban Smog: In and around cities photochemical smog is another negative consequence of modern life.
Photochemical smog from car exhaust has been implicated in the destruction of thousands of acres of Jeffrey pine and other tree species.
The threat of ozone pollution is particularly high when frequent sunshine promotes the formation of photochemical smog.
Additionally, The Automotive Research Association of India, in conjunction with five leading engine manufacturers, is developing a range of engines which will operate on Hythane[R], dramatically reducing NOx emissions which produce photochemical smog, a leading cause of lung cancer and serious respiratory problems.
Volatile organic compounds react in the air with light, and are one of the components leading to photochemical smog.
NOx is one of the main pollutants resulting from fossil fuel combustion - and when interacting with hydrocarbons and sunlight, it is responsible for ground-level ozone formation, acid rain and photochemical smog.

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