Carbon credits help even out the returns.

碳信用能够帮助平衡这些回报。

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But so far forest carbon credits remain a small, voluntary market.

但是到目前为止，森林碳排放份额信贷仍属小规模自发性市场。

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However, some scientists believe that carbon credits can still be a valuable tool.

尽管如此，一些科学家认为碳信贷可能仍然是有价值的方法。

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However, some scientists believe that carbon credits can still be a valuable tool.

尽管如此，一些科学家认为碳信贷可能仍然是有价值的方法。

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