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Name any one greenhouse gas and its poss...

Name any one greenhouse gas and its possible source of production on a large scale. What are the harmgul effects of it?

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Carbon dioxide is a major greenhouse gas. Various human activities such as combustion of fossil fuels, electricity generation, transportation and industries are sources of its large scale production. Excess of `CO_2` is harmful and considered as a pollutant. It is because it traps longer wavelenght IR radiations reflected by earth.s surface, thus causing global warming.
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