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NaturalDisasters-自然灾害
Inthepasthundredyears,therehaveheenfrequentnaturaldisasters,suchasfloods,droughts,mud-rockflows,seismicseawaves,earthquakes,windstormsandthestretchingofnewdeserts.Thedisastershavekilledmillionsuponmillionsofpeople,destroyedcountlesshomes,andwipedoutnumerouspiecesoffertileland.
Nowmoreandmorepeoplebeeawarethatthosedisastershavemuchtodowithwhatwehavedootheearth.Wehavecutdowntoomanytreesintheforests,wehavebadlypollutedtheenvironment,wehaveshockedourownhome-platimeandagainwithtremendouslypowerfulexplosionsofnuclearbombs.Asaresult,climateshavebeeabnormal,rainwaterrushesdownhillsidesangrily,andtheundergroundenergygoesuptorevengeitselfonus.
Theearthisouronlyhome-pla.Itisurgentforustostopdamagingit,andtodoourbesttoprotectitandmakeitalovelyplacesuitabletolivein,forwehavenowheretogoandsurviveexceptwherewearenow.