There's a bigger question here, though, relating to how humans — as populations grow and grow more prosperous — choose to relate to the other inhabitants of this very finite planet. (dotearth.blogs.nytimes.com)
Kenneth Boulding, economist and President Kennedy's Environmental Advisor 1966 (lived 1910 — 1993) «Anyone who believes in indefinite growth of anything physical on a physically finite planet is either a madman or an economist.» (populationmatters.org)