future food shortages

Popular Science magazine has a feature about Earth's future food problem - "The challenge of growing twice as much food by 2050 to feed nine billion people—with less and less land—is everyone’s problem. But scientists are hard at work fomenting a second green revolution.

Some suggestions included farming the desert, using robot labour and making supercrops.

One would hope that part of the solution would be to minimise food wastage and discourage gluttony.

There is always Soylent Green.