Global Warming: Cause and Mitigation

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Submitted By MaxDathen
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Climate change is attributable to both natural and anthropogenic factors. Anthropogenic climate change, which are also known as human induced climate change, is a result of increase in greenhouse gases, including carbon dioxide, methane, nitrous oxide and chlorofluorocarbons in the atmosphere, increase in atmospheric aerosols, and changes in land use, for instance, through cutting down of forests to create farms. The increase in greenhouse gases in the atmosphere causes an increase in the amount of heat that is being retained and consequently, increasing the temperatures on the earth’s surface significantly. For example, the amount of carbon dioxide concentration in the atmosphere has risen by more than 30 percent since the industrial revolution (Mulvaney, 2013). Atmospheric aerosols absorb infrared and solar radiation and also change the chemical composition of the clouds, both physically and chemically. Industrial processes, human activity, biomass burning and exhaust emissions lead to chemical reactions, which consequently, form aerosols in the atmosphere. Changes in land use have also led to a significant increase in the sunlight reflected back into the surface. In North America and Eurasia, during the industrial era, it is estimated that one-fifth of land was attributed to agricultural activities and deforestation. On the other hand, natural climate changes can be a result of changes in suns energy and shifting of the orbit of the earth. Essentially, the earth’s orbital tilt changes after 41,000 years and as a result causing significant changes to the earth’s climate. One such example would be the Sahara Desert, which was once very fertile grassland and now is a barren waste land, which can be attributable to the orbital tilt. The sun's energy output has also changed, evidenced by increase in sun spots. This has made a considerable impact on the changes in…...

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