Today the snow falls on the human world. The scenery is so wonderful and so beautiful. And the white world seems so peaceful and quiet. As I have been looking forward to the snowfall for ages, I feel rather glad. But its a pity that the snow is so th

Today the snow falls on the human world. The scenery is so wonderful and so beautiful. And the white world seems so peaceful and quiet. As I have been looking forward to the snowfall for ages, I feel rather glad. But it's a pity that the snow is so thin that we can neither make snowmen nor fight with snow.
  How does the phenomenon happen? Because the human beings are so selfished. They only care about their own benefits. They often send the waste gas to our nature and throw the waste plastic bags everywhere, which lead to the green house effect. As a result of the green house effect, our earth is becoming warmer and warmer. The ice lands are melting. The sea level is getting higher. No wonder we always suffer from the flood and drought disasters.
  If human beings don't realize the problem and continue to destroy our environment, our world will turn out to be a terrible hell. Therefore, something must be done to protect our environment. It's not only to protect our earth, but to protect our human civilization as well.
 

.特别感谢 梁宇投稿。