Political Animal recently did a series of entries on Peak Oil that I found to be very enlightening. If you've never heard of Peak Oil, then go here first:
Peak Oil Primer
Don't freak out, as lots of people do. Life After the Oil Crash presents things in as terrifying a manner as possible, and it's just no fun to live life that pessimisticly. It's a bit of a downer. Anyway, here are the links to the series:
Highly recommended. I pity the politician who finally deals with this issue, because the solutions probably aren't going to be popular or easy.