Thereisaneedforusprotectionoftheenvironment.Wecandoalotofthings.Firstly,wecanusemoreclothbagsinsteadofuseplasticbags.Secondly,Weshouldwalkmuch,useliftsandcarslessaswellaspossible.Thirdly,weshouldeatlessfastfood,becausemakefastfoodwillproducealotofCO2,that'sverybad,isn'tit?Thefourthisthatweshouldsavewater,trynottousetheflashtoilet,anddon'tbathforlong.Thefifth,wecanuselessair-conditioner.Ithink,ifeverybodytakeapartinenvironmentalprotection,theearthmustbemorebeatiful.