(1) No more than 1-3% of the Earth’s ice-free land area is occupied by humans.
(2) Less than 11% of the Earth’s ice-free land area is used for agriculture.
(3) Somewhere between B and 22 times the current world population could
support itself at the present standard of living, using present technology.
(4) This leaves 50% of the Earth’s land surface open to wildlife and conservation areas.