今天爺爺開著車帶我和姐姐出去玩。在半路上我發(fā)現(xiàn)了一個大煙囪，從里面冒出了陣陣白煙。我問姐姐：“那些煙囪是在制造云彩嗎？”姐姐撲哧一聲笑出了聲來說：“那些白煙是污染空氣的白煙，不是云彩?！蔽殷@奇的看著姐姐，一句話也說不出來。

Today, grandpa took me and my sister out in a car. On the way, I found a big chimney, from which came out bursts of white smoke. I asked my sister," are those chimneys making clouds?" My sister chuckled and said," those white smoke are the white smoke that pollutes the air, not the clouds." I looked at my sister in surprise and couldn't say a word.

世界上污染空氣的事情可真多呀！我們要少吃燒烤，少造工廠，少排放廢水，少砍樹木，我們和大自然交個朋友吧！讓我們保護(hù)大自然，讓大自然變得更加美麗！

How many things pollute the air in the world! We should eat less barbecue, build less factories, discharge less waste water and cut less trees. Let's make friends with nature! Let's protect nature and make it more beautiful!