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Do you know that carbon dioxide accounts for about 50% of the greenhouse effect. Methane accounts for 15 - 20% of the greenhouse effect. Clorofluorocarbons account for about 15% of the greenhouse effect. Nitrous oxides account for about 5% of the greenhouse effect. The theory about global warming holds that these trace gases form a shield around the earth. Prevents some of the infrared waves from the earth from escaping into the atmospher. These trace gases have increased as a result of intensified industrial activity. The activities of humans account for most of the changes in the atmospher. Such activities include the combustion of fossil fuels for energy. Industrial and agricultural practices. Burning of vegetation and deforestation.
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