photochemical smog


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photochemical smog

[¦fōd·ō′kem·ə·kəl ′smäg]
(meteorology)
Chemical pollutants in the atmosphere resulting from chemical reactions involving hydrocarbons and nitrogen oxides in the presence of sunlight.
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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,
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.
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.
With the implementation of the Amendment Regulation, an annual reduction of about 370 tonnes of VOC emissions is expected, which will help reduce photochemical smog formation," the spokesman said.
Volatile organic compounds react in the air with light, and are one of the components leading to photochemical smog.
A 6-inch will show Titan's orange color: the photochemical smog that makes its thick atmosphere opaque.
Formation of secondary pollutants like sulphates and environment 209 photochemical smog is a very common phenomenon.
Topics covered include steady- and non-steady-state modeling, chemical kinetics, stratospheric ozone, photochemical smog, the greenhouse effect, carbonate equilibria, the application of partition coefficients, pesticides, and toxic metals.
Figures 2 and 3 illustrate the photochemical smog chemistry within the two sides of the chamber during the experiment directly comparing photochemical reaction products formed with ISO or BD.

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