5、myideasonhowtopromoteit. Onthefirstplace,ano-cardayissupposedtosetupeveryweekinourschool.Becausecarsnotonlycauseseriousairpollutionbutalsowasteenergy.Onno-carday,neitherstudentsnorteachersareallowedtodrivetoschool.Meanwhile,justwalk,jump,cycleorrun.Useourlegsandenjoythefun. Ont