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Citation. Cohen, J. E.; Tilman, D. 1996. Biosphere 2 and Biodiversity--The Lessons So Far Science 274:1150-1151. [1589 LTER]
Excerpt. The major retrospective conclusion that can be drawn [from the Biosphere 2 experience] is simple. At present there is no demonstrated alternative to maintaining the viability of Earth. No one yet knows how to engineer systems that provide humans with the life-supporting services that natural ecosystems produce for free. Dismembering major biomes into small pieces, a consequence of widespread human activities, must be regarded with caution. Despite its mysteries and hazards, Earth remains the only known home that can support life.