1.地球是我们人类的家园，也是人类的母亲。我们依赖它，探索它。这个蔚蓝色的星球多么美丽，但我们要知道：地球只有一个！

2.环境对于我们来说，是非常重要的，它就像一把大伞，为我们遮风挡雨保护我们的家园，如果离开了这把神奇的伞，那我们的家园就会像撒哈拉大沙漠一样，一片死气沉沉，荒无人烟。所以我要向全球发出意示，让我们一起保护环境吧！

It is undeniable that the worsening environment has become the biggest concern of the present-day world. Land resources are dwindling because of water loss and soil erosion.

Waste gases poison the air we breathe. The rivers and lakes are polluted by waste dumped in them from factories. It is probably no exaggeration to say that deterioration of the quality of the environment threatens the existence of mankind itself.

Some people are of the opinion that the environmental problem is the price we have to pay for economic development.

But I do not think that this argument is valid. After all, what is the point of economic growth if people's lives are adversely alfected by worsening environmental pollution ?