MY COMMENTARY:
It is interesting that many of the same Malthusian voices trumpeting coming shortages, are also the ones at the forefront of seeking to halt or limit production.
There is an intimate relation between land, air, water and energy. Flying around the world, one sees VAST amounts of all of these, with tiny fringes of humans here and there. The only real resource dangers humans face are between the ears of those who seek to seize control of the rest of us in order to force their own apocalyptic views on us, and halt the growth of prosperity and consumption.
I've tried to not let my lifetime vegetarianism deprive me of some measure of common sense! :)