Word: regenerative
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Dates: during 1960-1969
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...Life Support Systems Research, is proud of his group's success, yet he has no illusions that algae will join the crews of spaceships for quite some time. In principle, algae are ideal, requiring nothing but the sunlight filtered through a spaceship's windows to regen erate oxygen and dispose of CO2. But they demand a lot of water to live happily; the Boeing system contains 80 gal lons, weighing more than 600 Ibs. Pilgrim is sure that this prohibitive weight can be reduced drastically, but he has other problems besides. Algae are delicate; they sometimes sicken, turn...
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