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Harvard professor finds a purpose for all that carbon dioxide in the atmosphere.

Lab process that mimics photosynthesis has potential for perpetually renewable fuel.

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The lure of extracting hydrogen from water in a somewhat real-time fashion in sufficient quantities to power an automobile has so far been a complete dead-end pursuit. One of the biggest problems is that it takes more energy to release the hydrogen from its water-tight bonds than is actually returned by the resulting hydrogen.

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