One planet,howmanypeople?Areviewofearth's carrying capacity.Adiscussionpaperfortheyear of RIO+20

摘要

We travel together, passengers on alittle spaceship, dependent on its vulnerable reserves of air and soil; all committed, for our safety,to its security and peace; preserved from annihilation only by the care, the work and the love we give our fragile craft.We cannot maintain it half fortunate, half miserable, half confident, half despairing, half slave-to the ancient enemies of man-half free in a liberation of resources undreamed of until this day. No craft, no crew can travel safely with such vast contradictions. On their resolution depends the survival of us all.