"For a planet to have breathable air, wouldn’t have to have abundant plant life?"
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how does microgravity effect plant growth under an elevated CO2 level?
Although your question touches on some aspects of astrobiology, it is more suited for the experts at NASA's Fundamental Space Biology Program, where they specialize in questions about Space Life Science. You can reach their outreach website at: http://weboflife.ksc.nasa.gov/faq.htm. If you are interested in what astrobiology is, or in what astrobiologists do, you can get more info at: http://nai.arc.nasa.gov/astrobio/what_astrobio.cfm. Best of Luck! David Lamb, Science Projects Specialist, NAI
October 23, 2002
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