2、e.ItissuchanimportantprojectthatIcan’twaittoexpressmyideasonhowtopromoteit.First,weshould 18ano-cardayeveryweekinourschool.Becausecarsnotonlycauseseriousairpollutionbutalsowasteenergy.19theno-carday,neitherstudents20teachersareallowedtodrivetoschool.At thesametime,justwalkorrun.Useour leg