Presentation on Global Warming

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Global warming From Wikipedia, the free encyclopedia Jump to:navigation,searchGlobal mean surface temperatures 1856 to 2005.Mean surface temperature anomalies during the period 1995 to 2004 with respect to the averagetemperatures from 1940 to 1980. Global warming is the observed increase in the average temperatureof the E arth's atmosphereandoceans in recent decades. The Earth's average near-surface atmospheric temperature rose 0.6 0.2 Celsius(1.1 0.4 Fahrenheit) in the 20th century[1].The currentscientific consensusis that "most of the observed warming over the last 50 years is likely tohave beenattributable to human activities"[2]. The extent of this consensus was the subject of a study published in December 2004 in the journal Science that considered the abstracts of 928 refereedscientific articles in theISI citation databaseidentified with the keywords "global climate change". ThisstudyWhat is Global Warming