GlobalWarming1.What is global warmingGlobalwarmingisthegradualriseintheEarthstemperaturecausedbyhighlevelsofcarbondioxideandothergasesintheatmosphere.2.What caused global warmingl l NaturalcausesGreenhouseeffectGreenhouseeffectl l HumanreasonsHumanactivities-emissionHumanactivities-emissionGreenhouse effectThe so-called greenhouse effect is short wave The so-called greenhouse effect is short wavesolar radiation through the atmosphere into solar radiation through the atmosphere intothe ground, an
