global warming

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I have to write a paper on global warming and i want to know preventative measures and ways to reduce global warming.I already know that global warming is the increase in the average temperature of earths near surface air and oceans since the mid 20ths and it is projected continuation , according to a report by the intergovernmental panel on climate change global surface temperature increased moderately between the start and the end of the 20th century.the scientific community largely agrees that the most observed temperature increase since the middle of the 20th century was caused by increasing concentrations of greenhouse gasses which result from human activity such as fossil fuel burning and deforestation