树木可以吸收二氧化碳和释放氧气。
树木可以吸收二氧化碳，并释放氧气，这非常重要。
Trees take in carbon dioxide from the air and make oxygen. That's important.
其次，不同种类的树木可以吸收二氧化碳，所以我们还需要种植更多的树。
Second, there are different kinds of trees which can absorb carbon dioxide, so we also need plant more trees around us.
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