We could try harder not to lose or waste food that we produce: FAO estimates that each year, approximately one-third of all food produced for human consumption inthe world is lost or wasted.[1] (Note that this is not just about people throwing away food they bought, though it's a big part of it.)
And at first glance it seems obvious that eating less meat, globally, is going to increase available calories/area; the fact that some areas are viable for livestock but not vegetables notwithstanding. About half of the area used for agriculture is used for livestock, if I read [2] correctly.
And at first glance it seems obvious that eating less meat, globally, is going to increase available calories/area; the fact that some areas are viable for livestock but not vegetables notwithstanding. About half of the area used for agriculture is used for livestock, if I read [2] correctly.
[1] http://www.fao.org/3/i3347e/i3347e.pdf
[2] http://www.fao.org/3/ar591e/ar591e.pdf