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1995: "The balance of evidence suggests a discernible human influence on global climate." 2001: "There is new & stronger evidence that most of the warming observed over last 50 yrs is attributable to human activities 2007: "Warming of the climate system is unequivocal, as is now evident from observations of increases in global avg. air & ocean temps, widespread melting of snow & ice, & rising global avg sea level" and "most of the observed [[upward arrow]] in globally avg T's since mid-20th C is [[underline]] very likely >90%[[/underline]] due to the observed [[upward arrow]] in anthropogenic GH gas concentrations" _____ Global energy sources Oil ~36% oil ->transportation Coal ~28% gas -> heat, power & manuf Gas ~24% coal -> power Hydro/nuc ~6% _____ [[underline]] Energy [[/underline]]: ~20% transportation 40% power 40% heat