為豐富中學生的環(huán)保知識，培養(yǎng)防護意識，學校英語社針對我國霧霾天氣頻現(xiàn)，危害嚴重的現(xiàn)狀，決定在學生中舉行英語征文比賽。請你根據(jù)以下提示寫一篇短文參賽。

　　1．霧霾天氣的危害：

　　2．霧霾產生的原因；

　　3．自我防護的方法。

　　參考詞匯：尾氣排放：exhaust emission

　　霧霾天氣：hazy weather

　　注意：1．詞數(shù)：120_-150；

　　2．可適當增加細節(jié)，以使行文連貫。

　　Nowadays, the hazy weather frequently appears in our country. It has not only done harm to people’s health, but also affected the public transportation. Terrible accidents happen every now and then, some highways have to be shut down because of the low visibility.

　　Obviously, air pollution is the main factor that has resulted in the frequency of hazy weather. At the same time, smoke from burning coal and all kinds of dust are also important factors. Besides, exhaust emission from cars and buses has made the situation even worse.

　　So proper measures should be adopted to deal with the serious problem. To students, opportunities for outdoor sports activities should be decreased, washing faces and hands with running water after each outing is also important, and do not forget to wear a good-quality mask to protect yourself while going out.

　　I hope we will regain a fresh, clean and bright world soon.