20. Why is there so much support for corn-based ethanol, if it seems to have so many problems?

It might be worth a mention that the total amount of topsoil left in the world for growing all of our food, corn for ethanol... will last between 24 [conservative estimate] to 48 [wishful thinking] years.

Ideally, biofuel would be a separate topic by itself, and we could get into a whole host of problems. I thought about the soil issue. Maybe I can figure out a way to work it in.

I added a few words about topsoil.