Biofuel

[posted by Callimachus]

Corn ... sugar ... what about marijuana? OK, it's not as good as Dennis the Peasant's idea to stop global warming by keeping your refrigerator door open, but it would be a boon to farmers (amber waves of weed) and wean us off Mideast and Venezuelan oil without taking anything out of the food chain. No, you can't actually run an internal-combustion engine on it, but if you smoke enough you won't care if your car is moving or not.

There. I've done my bit for today.