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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Nitrogen oxide emissions are contributing to the global environmental problems, including photochemical smog, acid rain and elevated fine particulate levels.
On the basis of composition there is the classical and photochemical smog with differrences in the composition depending on different geographical regions, various factors contributing to air pollution and suspension of particulate matter in the atmosphere; as in China, coal burning has been identified as a major reason which led to the major component of smog being sulphur dioxide whereas in Delhi, Nitric oxide and Cabronmonoxide have been identified as the constituents of smog due to increasing traffic and waste burning.3
"Summer heat can lead to the formation of ground-level ozone, a major component of photochemical smog," the agencies said in a joint statement.
Summer heat can lead to the formation of ground-level ozone, a major component of photochemical smog. Automobile exhaust and out-of-state emission sources are the primary sources of ground-level ozone and are the most serious air pollution problems in the northeast.
However, if it is too thick in the air, it can generate photochemical smog that can affect people with respiratory diseases such as asthma.
Also harmful environmental effects such as acid rain producing, global climate changing, Earth's temperature increasing, phenomenon of photochemical smog creation and ozone layer depletion arise from these compounds.
Research in the 1950s showed that together with sunlight, these pollutants catalyze the rapid formation of ozone in the air--a process known as photochemical smog formation, of which ozone and secondary aerosol particulate matter are the main by-products.
Smog is derived from vehicular emission from internal combustion engines and industrial fumes that react in the atmosphere with sunlight to form secondary pollutants that also combine with the primary emissions to form photochemical smog. In certain other cities, such as Delhi, smog severity is often aggravated by stubble burning in neighboring agricultural areas.
Mohammad Hanif briefed on seasonal temperatures, rainfall shifts and consequential food insecurity in Pakistan saying the country was affected by Photochemical smog also known as Bad Ozone Layer due to 10 centigrade change in temperature which was the most dangerous for human health.
Photochemical smog was derived from coal emissions, vehicular emissions, industrial emissions, forest and agricultural fires and photochemical reactions of these emissions, he said.
A 6-inch shows Titan's orange color: Its haze is photochemical smog, thick enough to hide Titan's rainclouds, rivers, dark hydrocarbon mudflats, and lakes of liquefied natural gas.
The word smog was first used in London during early 1950.1 Chemical reaction of sunlight typically known as photochemical smog is produced in the environment by nitrogen oxide and natural volatile compounds.

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