Ignoring effects of added mass due meteorites or other extraterrestrial objects, does increasing human population increase the overall mass of the Earth? It would seem that it should not, given that humans and animals are comprised of Earthly stuff like water and minerals. If that's true, it would imply that increasing human and animal populations would require a commensurate reduction in the amount of plant mass on Earth, resulting in no net change to the Earth's mass.
True or not? Justify your answer!
Corollary: If increasing human and animal population requires an offsetting reduction of plant life, how long will it be before there is insufficient plant life to sustain animal life on Earth? Is there a "break even" point? Is it already here, and is resulting in the extinction of certain species, or would such extinction occur anyway?
Enjoy!
2007-04-28
03:36:40
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3 answers
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asked by
G B
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