Planet could be 'unrecognizable' by 2050
news.yahoo.com
news.yahoo.com
It turns out that it's now quite easy for nations to be self sufficient in food. Many developing nations already are food exporters. The idea that an increase in population will cause resources to become more scarce is silly nonsense. People create resources, very few resources are actually all that limited (even gold). More people and more demand means more resources will be produced. More clean water. More Iron. More Aluminum. More food.
And it need not have such a drastic impact on the planet. The US has vastly increased its per capita food production and its population over the 20th century, yet the impact of farming has actually diminished due to improved and more efficient practices.
Edit: http://en.wikipedia.org/wiki/Simon%E2%80%93Ehrlich_wager
And it isn't going to stop with corn either. Big-Ag is expanding BIG into Asia, South America and to a lesser degree Africa and a lot of awesome work is being done on Rice, Canola, Sunflower and Sorghum. Those crops will be making some major gains in the next 10 years.
Don't let the Malthusians scare you, everything is going to be alright.