BluePlanetWeallhaveacommonhome.Sheprovidesuswithenoughfood,enoughwaterandenoughlivingroom.Wegeteverythingfromthenaturetolivebetter,butwedonnotdoanythingtoprotecther.Howtheairispolluted;theearthispoisoned;waterisunsafetodrinkandrubbishisburyingthecivilizationthatmanowns.Ourenvironmentisbeingpollutedfasterthannatureandman'spresenteffortscanprevent.Timeisbringingusmorepeople,andmorepeoplewillbringusmoreindustry.Somanytreeswillbecutdown,andmorelargecitieswillbesetup.Lotsofwastematerial,inreturn,isproducedandharmstheenvironment.Sosomeexpertsdeclarethatthebalanceofnatureisbeingupset,sothattheverysurvivalofmanisindanger.Howcanwesolvethisproblem?Theansweristhatwemustcontrolthespeedofgrowingpeople,forbideveryonetocutdowntreesandpourwastewaterintoriversandsoon.Ifweachievethis,theenvironmentwillturnveryclean,andourfuturewillbefullofhappiness.挺简单的~符合你的要求.