Now， our side of the car constant more up， the environment also increasingly worse! That the air around us there are many harmful substances。 Therefore， we want to Sue around things start to do。 For example， we can go to school by bike or walk， it can exercise。 If you have time can use less elevator， many climb stairs。 We can not only physical exercise， but also to protect our environment。

　　此刻，我們身邊的汽車不斷的多了起來，環(huán)境也越來越糟糕！以至于我們周圍的空氣有很多有害物質(zhì)。所以，我們要從身邊的小事做起。比如，我們能夠騎自行車上學(xué)或者步行，這樣還能夠鍛煉身體。有時(shí)光的話能夠少用電梯，多爬樓梯。我們不僅僅能鍛煉身體，也能保護(hù)我們的環(huán)境。