Green house gasses had no great effects on the environment some few years back. But as car technology grew we scientists have been seing some side effects on there increase in the atmosphere. Green house gasses such as methane and Carbon dioxide are responsible for warming the earths atmosphere. However scientists feel that an abnormal increase may cause global warming, which is has now been realised by some areas. Global warming may cause the polar ice to melt and subsequently increase the ocean water levels and this may cause flooding. Some scientist however are not quite sure whether global warming is the result of increasing green house gasses but they all agree not looking up at the matter is an experiment that we don't want to take. Many developed world countries have proposed a study in the matter and  the creation of inventions that may help reduce these gassses emmision. And so far the following inventions are on there way:

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• CATALYTIC CONVETER *1

A device incorporated in the exhaust system of motor cars and other vehicles that reduces emissions of certain pollutants. Exhaust gases are passed through chambers coated in such rare metals as palladium and platinum; these metals act as catalysts, encouraging chemical reactions that change such pollutants as carbon monoxide, nitrogen oxides, and certain hydrocarbons into carbon dioxide and water. Emission standards made catalytic converters mandatory for new petrol-engine cars sold in the United States since 1983 and in the EU since 1993. Recently, catalytic converters for diesel engines have also been developed.
 In practice catalytic converters reduce emissions less than in test conditions. They can take an 8-km (5-mi) drive to become effective and require the vehicle to use unleaded petrol, since lead causes them to cease functioning. They increase fuel consumption, and there is concern regarding the environmental impact of obtaining and disposing of the rare metals they contain.

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• ELECTROSTATIC PRECIPITATOR *2

An electrical device for removing suspended impurities such as dust, fumes, or mist, from air or other gases, developed around 1906. Although more expensive than mechanical collectors such as air filters, electrostatic precipitators are more efficient, and are particularly effective in removing very fine particles. The gas to be purified moves through passages that have a series of discharge electrodes suspended in the passage centres, insulated electrically from the rest of the precipitator. The electrodes are supplied with direct current at high voltages ranging from 30,000 to 75,000 volts. Beyond the discharge electrodes are large metal collector electrodes that are electrically charged.
 The high-voltage current applied to the discharge electrodes ionizes the impurities; this ionization charges the suspended particles. The collector electrodes have a charge opposite of the ionized particles, so the suspended particles move towards the collector electrodes and become deposited on the electrode's surface. Periodically, the collector electrodes must be washed or scraped clean to remove the deposited impurities. Electrostatic precipitators are used extensively in eliminating atmospheric pollution from the exhausts of industrial devices such as steam boilers and cement kilns; they are also used for collecting sulphuric acid and phosphoric acid mists, and recovering sodium compounds in soda and sulphate pulp mills.
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