当树木生长时它们吸收二氧化碳，而当它们燃烧时它们会释放大概等量的二氧化碳，也因此如果控制合理的话，木材被认为是一种可再生的中性碳燃料。

Trees absorb CO2 from the atmosphere as they grow, roughly equal to that they release when burnt. Wood is thus considered a renewable, carbon neutral fuel, if from managed sources.

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它们不仅提供商品和生计，而且还保护土壤，调节水分和吸收二氧化碳。

Not only do they provide goods and livelihoods but they also protect soils, regulate water and absorb carbon.

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尽管生物物质当它燃烧时，像汽油一样释放碳，但是当植物生长时，它们吸收大气中的二氧化碳，减少了总的碳迹。

Even though biomass releases carbon when it is burned, just like oil, when new plants are growing they absorb carbon dioxide from the atmosphere, reducing the overall carbon footprint.

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