全球变暖课件.ppt

文档介绍：Unit4GlobalWarmingSavetheearth!Period1&2WarmingupandReadingIWorkingroups---listthingsasrequired:,()()Warmingup–I(3m)puterfridgestovewashingmachinehairdryervideorecordercoaloilnaturalgaswind(power)sun(solarenergy)water(hydro-electricpower)thesea(tidalenergy)uranium(nuclearenergy)biomassenergyHowabouttheplants?Ifitlackssolarenergy,theplants…??ingwarmerandwarmerGreenhousegases!Whataregreenhousegases?What’sgreenhouseeffect?What’swrongwithourearth?methaneCarbondioxideWatervapourGreenhouseEffectpartMainideaPart1(paragraph___)Part2(paragraphs__to__)Part3(paragraph__)Part4(paragraph___)It’esaboutListtwodifferentattitudesamongscientiststowardsglobalwarming12567