Therearestillmanyproblemsofenvironmentalprotectioninrecentyears.Oneofthemostseriousproblemsistheseriouspollutionofair,waterandsoil.thepollutedairdoesgreatharmtopeople‘shealth.Thepollutedwatercausesdiseasesanddeath.Whatismore,vegetationhadbeengreatlyreducedwiththerapidgrowthofmoderncities. Toprotecttheenvironment,governmentsofmanycountrieshavedonealot.Legislativestepshavebeenintroduce...[繼續(xù)閱讀]