This is an interesting poster about the possibilities of peak oil. If you're not familiar with the concept, here it is in a nutshell: The world is running out of oil, and our discovery/production phase may have already peaked. Then again, it may not have. It's a lot like the Seventh-Day Adventists/Millerites trying to predict the end of the world, and we all know how accurate they turned out to be!
Click on the image from the page for all the interesting factoids.