Because global warming poses a threat, global warming’s definition and its associated facts serves as very useful information. Merriam-Webster dictionary defines global warming as “the recent increase in the world’s temperature that is believed to be caused by the increase of certain gases (such as carbon dioxide) in the atmosphere.” Average global temperatures have risen to unusually high levels (Nuccitelli). In the last fifty years, the average temperature of the Earth’s surface has risen faster than ever recorded (Nuccitelli). A graph depicting the temperatures recorded shows a rise to nearly two times the highest average temperature since 800 A.D.; the temperatures on this graph are estimates from the amount of the sun’s influence, which can be known back to those dates (Nuccitelli) Even the last decade indicates abnormal temperatures: “Eleven of the last twelve years (1995-2006) rank among the twelve warmest years in the instrumental record of global surface temperature” (“Climate Change 2007: Synthesis Report”). In shor...
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"Global Climate Change Indicators." National Climatic Data Center. NCDC, n.d. Web. 31 Mar. 2014.
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"Global Warming Solutions: Reduce Emissions." Union of Concerned Scientists. UCS, n.d. Web. 31 Mar. 2014.
"Can You Make a Difference?" Environmental Defense Fund. EDF, n.d. Web. 30 Mar. 2014.
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