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，我们身边的汽车不断的多了起来，环境也越来越糟糕！以至于我们周围的空气有很多有害物质。所以，我们要从身边的小事做起。比如，我们能够骑自行车上学或者步行，这样还能够锻炼身体。有时光的话能够少用电梯，多爬楼梯。我们不仅仅能锻炼身体，也能保护我们的环境。