Question

概括下面英语文章的主要大意

In the past, man did not have to think about the protection of his environment. There were not many people on earth, and natural resources seemed to be unlimited.
　　Today, things are different. The world has become too crowded. We are using up our natural resources too quickly, and at the same time we are polluting our environment with dangerous chemicals. If we continue like this, human life on earth will not survive.
　　Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow on the land. Yet, we continue to use bigger and more powerful machines to cut down more and more trees.
　　We realize that if rivers are polluted with waste products from factories, we will die. However, in most countries waste products are still put into rivers or into the sea, and there are few laws to stop this.
　　We know, too, that if the population of the world continues to rise at the present rate, in a few years, there will not be enough food.
　　What can we do to solve these problems?
　　If we eat more vegetables and less meat, we will easily get more food. Land that is used to grow crops can feed five times more people than land where animals are kept.
　　The world population will not rise so quickly if people use modern methods of birth control.
　　Finally, if we educate people to think about the problems, we shall have a better and cleaner living place in the future.

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Answer 1

在过去，人们不必考虑环境的保护。没有地球上的许多人，自然资源似乎是无限的。
今天，一切都不同了。世界已经变得太拥挤了。我们正在利用我们的自然资源太快，同时我们与危险化学品污染我们的环境。如果我们继续这样下去，地球上的生命将无法生存。
现在大家都意识到如果从海里的鱼太多，有没有将很快离开。然而，现代的捕鱼方法，捕获了更多的鱼。我们都知道如果砍伐太多的树木，森林就会消失，大地将寸草不生。然而，我们继续使用更大和更强大的机器砍倒越来越多的树。
我们认识到，如果河流被工厂排出的废料污染，我们会死的。然而，在大多数国家，废弃物仍然源源不断地进入河里或海里，很少有法律来阻止这样的。
我们知道，太，如果世界人口继续以目前的速度增长，在未来几年内，将不会有足够的食物。
我们能做什么来解决这些问题？
如果我们多吃蔬菜，少吃肉，我们会很容易地得到更多的食物。土地是用来种植作物可以养活五倍的人的土地上饲养动物。
如果人们使用现代化的生育控制方法上升如此之快，世界人口将不。
最后，如果我们教育人们思考的问题，我们应当有一个更好、更洁净的生活发生在未来。