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Recycling the Energy of Waste
The Scientist 2004, 18(12):14
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Every resource carried onto a manned spaceship is precious, because it costs hundreds of dollars to lift each pound of material past Earth's surly bonds. Now that NASA is in the process of planning a trip to Mars that might take up to two years, no type of recycling can be overlooked. One thing that can provide three basic raw materials (water, energy, and fertilizer) needed for a long space journey: human waste.
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