Dear Mike, 

Thank you very much for your concern. Recently many places in China including Ningbo were blanketed with thick yellow haze. Everything around disappeared from our sight. Some highways were closed. Traffic jams were commonly seen in the streets. Many people, especially children and seniors, even found it difficult to breathe. As a result, local hospitals were crowded with people who had problems with their noses and lungs. Part of the cause was the dry weather, but the severely damaged environment contributed a lot to this nightmare.

To make a significant change, we really have to do more to protect our environment. To live a better life, we have to push on with the economy, but it would be meaningless if we had to achieve it at the cost of our breathing air.

Yours,

Li Hua

题目分析：本文是书信类作文，请给你的笔友Mike写E-mail，告知前段时间全国多地包括宁波等地出现雾霾的情况。文章的要点也基本上都给出来了，但是具体的内容要考生自己充实，考生要把要点解释清楚，不能有遗漏，更要有丰富的内容，在写作的过程中，要注意使用高级词汇和高级句型，如强调句，倒装句等，让文章更上档次。同时在列举措施的时候要使用合适的连接词如：First，second， Besides, What’s more等，让文章看起来很有条理，也很流畅。本篇文章在写作时不要啰嗦，力求简洁。

【亮点说明】所给范文语言简洁，应用了一些较好的词组和句子：be blanketed with被覆盖了，As a result因此, contributed to导致at the cost of以…为代价， Many people, especially children and seniors, even found it difficult to breathe.这句话用了it做形式宾语， local hospitals were crowded with people who had problems with their noses and lungs. 这句话用了定语从句， To make a significant change, we really have to do more to protect our environment. 这句话用了不定式做目的状语。