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Friday, November 11, 2016

Smog- It Is Not Natural Phenomenon But Man Created Hazard (Video And Images)








Pakistan came on the top of the list among the countries that are frequently hit by climatic changes. Pakistan suffers damage worth 6 to 14 billion dollars, annually. If we only take the damage done by 2010 floods that goes up to 10 billion dollars. Climatic changes cause severe rains, floods and storms, but we are to face a new challenge of climatic change, if we could not take stronger measures to fight it then the impacts of this alarming situation will create more negative climatic changes. This danger is that of pollution due to black carbon. This is no less dangerous than other factors. This pollution or particles of black carbon can cause quick melting of glaciers in our northern areas. According to Pakistan met office the isotopic analysis of ice samples collected from five glaciers in the Karakuram hilly range revealed decreased amount of black carbon on the lower level. Experts say the thick layer of black carbon affects the function of reflection of sunlight in ice. Later the ice reserves start to absorb sunlight in higher quantity and melting of ice gets fastened resulting in the formation of lakes. they indicated in the analysis results that Hitarchi Glacier which is 17 km long has the highest amount of carbon in ice samples i.e. 224 mg/m2. The Chinese scientists linked to Institute of Tibet Platue Research revealed that the carbon particles are being emitted by the steal industry in India and with wind that usually blows from east to west they enter in Pakistan and cause fog/smog in winter. The smog is created by the pollution of smoke due to burning of coal and woods. Smog is actually produced through a complex set of photochemical reactions involving volatile organic compounds and nitrogen oxides in the presence of sunlight that result in the production of ozone. Smog forming pollutants come from many sources such as automobile exhausts, factories, and many consumer products including paints, hair sprays, charcoal starter fluids, solvents and even popcorn plastic packaging. In typical urban areas, at least half of the smog precursors come from cars, buses and trucks.

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