Last time we talked about photosynthesis, the process by which plants use light to convert carbon dioxide and water into food.

上次我们讨论了光合作用，即植物利用光将二氧化碳和水转化为食物的过程。

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Photosynthesis creates plant matter out of carbon dioxide and water.

光合作用把二氧化碳和水转化成植物生长所需物质。

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When a hydrocarbon is burned, these bonds break apart in order to form carbon dioxide and water.

当碳氢化合物燃烧时，该键被破坏以生成二氧化碳和水。

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Gradually the microbes break down the waste, leaving behind carbon dioxide and water.

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In 1863 the Irish scientist John Tyndall determined that carbon dioxide and water vapor trapped more heat in the atmosphere as their concentrations increased.

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That hydrogen and carbon monoxide mixture is then pumped into one of two NOx traps, where it strips the oxygen from the NOx, forming nitrogen, carbon dioxide and water.

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