中考英语任务型阅读阅读下面的短文.并根据短文后的要求答题
Since1850.thetemperatureofEarth’ssurfacehasincreasedabout0
6°C.Scientistspredictitmaywarmmuchmorebytheendofthiscentury.Who’sturninguptheheat
Well,itseemsthatweare
Someofthisglobalwarmingmaybenatural.However,nearlyallscientistsnowagreethatmostofitisduetopeoplesactions.Overthepast150years,we'veaddedhugeamountsofcertaingases,especiallycarbondioxide(CO2)totheair.ThesegasescankeepheatnearEarth'ssurface,somorecarbondioxidemeansmoreheatiskeptnearEarth'ssurface.Globalwarmingmaychangetheweatherinwaysthatleadtomoreseverestorms,floodsanddroughts.Weaddcarbondioxidetotheairwhenweburnthings,especiallyfossilfuels.Fossilfuelsareenergysourcesformedfromtheremainsofplantsandanimalsthatlivedmillionsofyearsago.Coal,oil,andnaturalgasareallfossilfuels.PeopleintheUnitedStatesandotherc