1. Stop using corn-based ethanol to fuel your cars. Sure, it may be a tiny bit more environmentally sound, but it still pollutes and it's wasting food that could be used to feed hungry kids in Africa/Asia/South America. Carpool. Ride a bike. Take a hike.
2. Eat less meat. It takes 5 months of feeding a pig 8 pounds of feed per day to get it to full size - 265 pounds. (http://www.pork4kids.com). 1200 pounds of food (say, corn) create only 265 pounds of meat (less the inedible parts of the animal). Those 1200 pounds of corn can feed a LOT more people than ~265 pounds of pork. Additionally, more energy and vitamins & nutrients are absorbed through eating corn - because the pig has already digested & used much of that energy by the time you get to eating the pork. Seriously, beans & rice will save the world. If we allow it.
Every day, I'm more and more appalled by the wasteful gluttony I see here in this country. I may just learn Spanish and move to a monastery in Peru.
On a more fun note, my friend Matthew has made a fun video to share: