SavingtheearthAsweknow,withtheincreaseinpopulationandthequcikdevelopmentofmodernsociety,1)wehavechangedtheearthgreatly.peoplehavecutdownmillionsoftrees,forestshavebocomedeserts.2)Inbigcities,carsandbuseshavepollutedtheair.3)Factorieshavepollutedthelandandthewater.4)Andairpollutionhavedestroyedtheozonelayerandthathasmadeaveryholeintheozonelayer,sotoomuchharmfulradiationcometotheearth.5)Carbondioxideintheairhasincreasealot,thishasformedablanketaroundtheearth,anditcausethegreenhouseeffect.Alltheseproblemsareveryserious,sowemustdosomethingnow.Thegovernmentisdoingsomethingusefultoprotecttheenvironment.Asastudent,1)weshouldcareforwildanimalsandplantmoretrees.2)Wehadbetterwalkorrideabikeinsteadoftakingabusortaxiifwetravelashortdistance.3)weusebothsideofthepaper.4)weshouldrecyclewastepaper,boxesandplasticbottles.5)weshouldthewasteweproduceeveryday.6)weshouldtryspreadthemessageaboutprotectingtheenvironment.Inshort,wesoulddoeverythingwecantoprotecttheearth---ourhome.仅供参考，可以发问！据我所知，初一年的要求没有那么高，关于环保的话题要到初三才会学到的。特别税关于地球的危机。