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The earth is an invaluable asset that we have. We can not live without the protection of our mather nature. If we abuse the natural resources, we will get the punishment from the nature.
To make it simple, we should protect basic elements of the earth such as the woods, the air and the water. Bearing in mind that it may take 100 years to grow a tree, we should not waste it.
Otherwise, there may be no trees in earth. And people can not survive without the oxygen generated by trees.
In summary, protecting our environment is everybody's responsibility.素质考试啊小朋友你都考完试了吧，干脆就把我选作满意答案得了，反正对大家都有利，对吧？
