Human and nature are two relate parts in the world since human beings exist. However, as the revolution of animal, people are getting more and more selfish. We destroy forests to gain woods, pollute water for industry program, kill animals for their furs. As a result, we are facing the difficult of lacking water source, air pollution, and so on. As the saying gose, the most horrible and terrify thing is ourselves. What we have pay is what we have done. Is there any measure to take to deal with this problem? A part of pessimitive person stand the way that it's too late to bring the beautiful world back, we are never gettinng back anyway. They say it while watching the ruin land, the dying animals in front of them, the only thing they can do is just show mercy to these animals. Besides, some people are hopeful to solve this problem. They believe every thing is possible, nature can be crul, but as long as you recognize your mistakes, she can be wide-hearted too. Anyway, we are all just a short distance exist compare to the age of earth, or the guasts in the world. nature know what to do more than us. And I prefer the second opinion since we shall never lose hope in any situation, moreover, we're not done yet. the process of technology is able to find a way out. And as a citizen, all we should do is stop destroying nature. And I'm quite sure that it would be better and better.