Commercial Applications
Mention any four causes of the Greenhouse effect.
Environmental Issues
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Four causes of the greenhouse effect are:
Carbon Dioxide — Carbon dioxide is released into the environment every time fossil fuels are burnt for energy by factories, power plants and automobiles. Deforestation and burning of firewood also release carbon dioxide.
Chlorofluorocarbons (CFCs) — CFCs are used in industries that manufacture refrigerators, air conditioners, paints and other sprays. They have 15,000 times the impact of carbon dioxide and are responsible for about 25 percent of the overall greenhouse effect.
Methane — Methane is generated by hydroelectric reservoirs, and bacterial decomposition of flooded peat and forest biomass. Its heat-absorbing capacity is about 25 times more than that of carbon dioxide. It contributes about 12 percent of the greenhouse effect.
Nitrogen Oxides — Nitrogen oxides are released by excessive use of nitrogen fertilisers in agriculture and intensive vehicular traffic. Their heat-absorbing capacity is about 230 times more than that of carbon dioxide.
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