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为了保护地球有限的资源，我们应该采取什么措施呢?请根据下面的提示写一篇约80词的短文，短文开头已经给出。
提示词;1.save water, the source of life , protect drinking water, stop polluting, make full use of it
2.save electricity, crucial, turn off, other electric machines
3. save forests, useful ,stop cutting down
4.recycle useful rubbish, save resources
