Some disturbing news that didn't get as much pickup as it should. Lester Brown of the Earth Policy Institute, one of the foremost thinkers of global food security, has published an analysis of what could happen if people start using grain to power their cars, writes Ben King.
It's not as crazy as it sounds - convert the grain into alcohol, and you can use it to power an engine. It's being heavily promoted in the US, particularly Iowa, which grows a lot of corn and plays a vital role in choosing US presidents. But it's happening in Asia too.
The same about of grain can fill an SUV tank, or feed a person for a year.