今天，对于我们的地球和我们本身来说，污染已经变成了一个严重问题。
Today, pollution has become a serious problem to our earth and us.
地球是我们唯一居住的地方，所以可想而知环境对于我们的重要性。
The earth is the only one place we live in. So you know how important the environment is.
地球是我们唯一居住的地方，所以可想而知环境对于我们的重要性。
The earth is the only one place we live in. So you know how important the environment is.
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