無車日與環保

　　9月22 * 所在的城市和另外107個城市開展了無車日活動，倡議人們選用公共汽車、腳踏車或步行等綠色交通方式來代替開私家車。該活動得到了全國人民的支持，提高了人們節約能源與保護環境的意識，活動很成功。

下面請你用英文寫一篇短文介紹該活動，並談談開展該活動的必要性，號召更多的城市和居民參與到該活動中來。

注意：

1. 不要逐句翻譯，可適當發揮，以使行文連貫；

2. 詞數：100左右。

3. 參考辭彙：

無車日Car-free Day；

開展launch

One possible version：

Car-free Day was launched in our city and 107 other cities on September 22， to encourage people to take public transport， ride bicycles or walk instead of driving private cars.

The campaign has gained much support all over the country and has raised awareness among all people of energy saving and environmental protection. It's a real success.

With the development of the economy， more and more families have bought private cars， thus leading to much heavier traffic problems and more serious air pollution. Therefore， I think it's necessary to launch such campaigns. And I hope more and more cities and their residents will take part in this type of activity