Say it ain't so! Oil drops below $40 a barrel.

Oil has dropped below $40 a barrel. My friends at OPEC and Exxon Mobil are freaking out, no doubt. I'm freaking out, too. With every penny that the price of gas drops at the pump, I get a little less smug as I'm driving around in my station wagon that's powered by waste grease I get for free from a local restaurant. Who cares if I'm radically reducing my carbon footprint?