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Air Pollution

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Air Pollution Introduction Air pollution is caused by the fact that waste gasses are being released into the atmosphere by industrial companies. Some of these gasses are already in the atmosphere but because they are being unnaturally released into the atmosphere it is unbalancing the amount of chemicals. An example of this is the chemical Chlorofluorocarbon which after being pumped into the atmosphere for so long has know damaged it and has created a hole in the atmosphere. The hole is particularly dangerous as harmful U-V rays from the sun can get through and damage the skin. The Problems There are many different problems that are created by air pollution. One is the fact that it is causing the planet to heat up and therefore melting the world's ice-caps. This will cause the worlds sea level to rise and scientist have predicted that by the year 2100 Great Britain will be under water. ...read more.


biological decay 150 Hydrogen Sulphide (H2S4) volcanoes and biological decay 65 Figures for natural sources. Gas Source Amount produced per year in the world (millions of tonnes) Carbon Monoxide (CO) burning of fuels 300 Sulphur Dioxide (SO2) burning of coal and oil, roasting of sulphide ores 146 Hydrocarbons vehicle exhausts, chemical processes 88 Nitrogen Oxide (NO, NO2) vehicle exhausts, burning of fuels 50 ammonia (NH3) waste treatment 4 Hydrogen Sulphide (H2S4) chemical processes, sewage treatment 3 Figures for gasses produced by humans. As we can see the figures show that more gas is nearly always produced naturally. Many gasses that were produced were removed easily. Some were dissolved in rain and then washed into the soil. When gasses started to be produced by humans, the gasses in the atmosphere couldn't all be removed naturally. Some of these gasses reacted together at high temperature to produce products such as smog. ...read more.


The sulphur will react with the water or chemical and fall out. There is also a problem with this as there needs to be an environmentally friendly way of disposing of the sulphur. There are many ways of reducing nitrogen dioxide. Firstly we could change the ratio of air to fuel. By changing the ratio of air to fuel we increase the amount of oxygen that the fuels are being combusted in. The flame that is being used to burn the fuels could also be made cooler. This would mean that less NO2 would be released into the atmosphere. We can also inject chemicals such as ammonia, which will react with the NO2 and convert it back into nitrogen and oxygen. Lichen Lichens are like little sponges that take up everything that comes their way, including air pollution. Lichen specimens are chemically analysed to see what toxics were in the air. Most lichens are extremely vulnerable to air pollution. When lichens disappear, they give early warning of harmful conditions. ...read more.

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