Each year we've produced about 2,100Mt of grain. We need 1,230Mt if we feed people nothing else - give 'em their calories and protein, no nutrition.

About 750Mt goes to livestock, and 350Mt to biofuels. World stocks are about 420Mt, and these float up and down by 5-20Mt each year.

If not for biofuels, world grain stocks would rise by 340Mt or so each year - not far off doubling.

We produce enough food, it's just that a lot of it isn't used as food, but fuel.

We can easily feed the world twice over from what we grow. But we cannot both feed it and fuel it. When it comes to grains: food, livestock and fuel - choose any two.