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December 17, 2014

Global warming is the phenomenon that increase the average of atmosphere's temperature, ocean, and land earth. Global average temperature of the earth's surface increased 0.74 ± 0.18 °C over the last century. Most of the increase in temperature is caused by increased concentrations of greenhouse gases due to human activities, among which industrial waste directly without being processed, deliberate forest fires, air pollution caused by motor vehicle exhaust, etc (Malihah E 2012).

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Concentration of greenhause gases on the atmosphere will cause the reaction between CO2 (carbon dioxide) and O3 (ozone) so that the bonds between the molecules of ozone will be detached and make ozone layer continues to thin. The ozone layer is supposed to function as a protector of the earth from ultraviolet (UV) radiation emitted by the sun.