However, every stick has two ends. With modernization also comes pollution. Now human beings always throw waste into our nature. That's why our earth becomes a dirty place.

Modernization is necessary, since we can't go without it. Owing to the modernization, our life is improving day by day.

现代化是必须的，因为我们不能没有它。幸亏有了现代化，我们的生活可以日益改善。

In ancient days, people usually worked on the day and went to bed early at night. But as Tomas Edison invented the lights, we can do anything both on the day and at night. Moreover, the transportation becomes much more convenient than before. Nowadays, we can go anywhere we like. And human beings can even travel in the universe.

在古代，人们通常在白天干嘛，晚上早早的就上床睡觉了。但因为托马斯爱迪生发明了电灯，我们可以在白天或者晚上做任何事情。而且，交通变得比以前方便多了。现在，我们可以去任何我们喜欢的地方。人们甚至可以在宇宙中旅行。

However, every stick has two ends. Modernization also comes pollution. Now human beings always throw waste into our nature. That's why our earth becomes a dirty place.

然而，每个棒都有两端。现代化也带来了污染。现在，人类总是把废弃物仍给大自然。这就是为什么我们的地球变成一个肮脏的地方的原因。

If we continue to pollute our environment, our earth will be destroyed, so we have to do something to protect our environment. In the first place, we must form a good habit. Don't throw waste everywhere. Second, we had better go to work by bus or by bike, so as to reduce the tail gas. Third, the waste gas and water must be done before they are sent out. What's more, we should plant more trees and grasses to purify the air. At last, the government should make laws to prevent pollution.

如果我们继续污染我们的环境，我们的地球将要被毁灭了，所以我们应该做些什么来保护我们的环境。首先，我们必须形成一个良好的习惯。不要随处乱丢垃圾。第二，我们最好乘坐公共汽车或骑自行车去上班，以减少尾气排放。第三，废气和废水必须必须要先处理过再排放出去。更重要的是，我们应该种更多的树和草来净化空气。最后，政府应该制定法律来防止污染。