Negative and positive impacts of Space travel on environment?

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alex

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I need both negative and positives. I already got some on humanity so don't bother telling me about cost and stuff.

Thank you :)
 
Pollution and Fuel Consumption:
http://www.madsci.org/posts/archives/2000-10/973014746.Es.r.html

Deuterium's Potential As An Alternative Energy:
http://www.springerlink.com/content/w01m77336t108151/

You can find an abundant supply of this on the moon. Space travel will get us to the moon.

Also, use of He-3 from the moon is another, less dangerous energy source. (Deuterium-tritium fusion releases high energy neutrons which will easily damage a containment vessel).

Currently, space travel uses quite a bit of fuel, polluting the environment, but it can bring us better sources of energy back from the moon.
 
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