Inthepasthundredyears,therehaveheenfrequentnaturaldisasters,suchasfloods,droughts,mud-rockflows,seismicseawaves,earthquakes,windstormsandthestretchingofnewdeserts.
Thedisastershavekilledmillionsuponmillionsofpeople,destroyedcountlesshomes,andwipedoutnumerouspiecesoffertileland.
Nowmoreandmorepeoplebecomeawarethatthosedisastershavemuchtodowithwhatwehavedonetotheearth.wehavecutdowntoomanytreesintheforests,wehavebadlypollutedtheenvironment,wehaveshockedourownhome-planettimeandagainwithtremendouslypowerfulexplosionsofnuclearbombs.
Asaresult,climateshavebecomeabnormal,rainwaterrushesdownhillsidesangrily,andtheundergroundenergygoesuptorevengeitselfonus.
Theearthisouronlyhome-planet.itisurgentforustostopdamagingit,andtodoourbesttoprotectitandmakeitalovelyplacesuitabletolivein,forwehavenowheretogoandsurviveexceptwherewearenow.
numerous['nju:mərəs]adj.为数众多的，许多
revenge[ri'vendʒ]n.报仇，报复，复仇愿望，获得满足的机会
fertile['fə:tail]adj.肥沃的，富饶的，能繁殖的，多产的，(创造力)
abnormal[æb'nɔ:məl]adj.反常的，不正常的，不规则的
survive[sə'vaiv]vt.比...活得长，幸免于难，艰难度过
environment[in'vaiərənmənt]n.环境，外界
suitable['sju:təbl]adj.合适的，适宜的
protect[prə'tekt]vt.保护，投保
frequent['fri:kwənt]adj.经常的，频繁的
