[corkle]

Perhaps in the short term, but I don't think it would be beneficial long term. If humans are wiped out, which species would save or relocate planet earth's biosphere from the coming destruction by the sun going red giant in a few billion years? Humans can potentially preserve the biosphere through either stellar husbandry/engineering or travelling to the stars (or both). At a certain point, the solar radiation may get so intense as to boil the ocean and destroy the atmosphere. Then it is predicted to envelop earth which would seal the deal for any potential subterranean life.