Joel Stein on the joy of $8 dollar gas:

Cheap gas is unfair. Driving creates huge social costs in the form of traffic, health-damaging pollution and global warming that aren’t suffered solely by the person buying the gasoline. Governments usually set up idiotic systems to offset such social costs (emissions trading, ethanol subsidies, taco truck regulations) instead of forcing individuals to pay for their own mess by adding a tax to remedy the imbalance.