Air Pollution in London Essay Example | Topics and Well Written Essays - 1000 words

Air Pollution in London - shew ExampleConcentrations ofsix pollutants reduced between 2007 and 2008. Between 1998 and 2008 concentrations of eight pollutants have reduced.The substances that ca uptake atm taint atomic number 18 called pollutants. If they are pumped into our atmosphere and directly pollute the air are called primary pollutants. Carbon monoxide from car exhausts, sulphur dioxide from the combustion of coal is example for primary pollutants. If primary pollutants in the atmosphere undergo chemical substance reaction, and further cause defilement, they are secondary pollutants. Photochemical smog is an example for secondary pollutant.Air pollutants mainly occur as a result of gaseous discharges from industry and motor vehicles. There are alike natural sources such as wind-blown dust and smoke from fires. With increasing urbanisation and industrialisation, more pollution has been added to the air by industrial, commercial and domestic sources. When these concentrat ed gases like Co, Co2, So2, No2, Ozone, and Pm10 exceed safe limits, we have a pollution problem.Air pollution, particularly in cities, is not a new problem. Back in the middle ages the use of coal in cities such as London was beginning to escalate. In UK the industrial revolution during the eighteenth and 19th centuries was based on the use of coal. Urban air pollution levels often reached very advanced levels due to the burning of coal in industries, as well as in homes for domestic heat.During wooly-minded conditions, pollution levels escalated and urban smogs (smoke and fog) were formed. These often brought cities to a halt while disrupting traffic, and may also cause deaths. set up of air pollution on buildings and vegetation also became obvious. EffectsInhaling So2 in excess kernel would channelize to cough, tightening of chest, and irritation of lungs. NO2 results in irritation and inflammation of lungs. PM10 may cause inflammation of lungs, linkage of recollective term exposure to coronary heart disease and lung cancer. Intake of carbon monoxide in excess amount would leads to prevention of normal transport of oxygen by blood, resulting in the reduction of oxygen supply to the heart. Ozone causes wound on deep breathing, cough, irritation and inflammation of lungs. Benzene and 1, 3-butadiene leads to cancer. Lead is responsible for linkage of exposure to stricken mental function and neurological damage in children. In the great smog disaster in London in 1952, nearly 4,000 people died in a few days due to the high concentrations of pollution. Air pollution in London is decreasing formModerateHighYearModerateHighYearModerateHigh20002187200348032200639626200127524200422532007200122002 one hundred seventy-five720052305200813061. Days of moderate-high, and very high air pollution at selected urban sites across London during 2000-2008 (Source Defra). 2. Relative one-year fee-tail concentrations of SO2, PM10, Nox and NO2 monitored at several sites across London. (Source London Air Quality Network, Kings college London).According to the data, there has been a downward trend in the annual mean concentration of SO2. Since 2000 it had fallen significantly. By the spring of 2009 it had fallen by 80% since November 1996. Annual mean concentration of PM10 has decreased by nearly 26 % between November 1996 and late 2008. The concentration of NO2 has fallen since 2000, and straight off appears to