Clark is always investigating the push to go green in the auto industry. Not long ago he spoke about the Air Car, a vehicle that runs on compressed air instead of gasoline. Now he recently heard that McDonald's franchises in England are planning to run all their delivery trucks on recycled fryer grease. Previously McDonald's had to pay to dispose of the grease, but now with some processing equipment they'll be able to save that money and leave the world of diesel fuel behind forever.

Closer to home, Clark is still weighing the idea of purchasing a Honda Civic that runs entirely on compressed natural gas. The benefits include that he won't have to give one more penny to foreign oil-producing nations who want to destroy us, and the vehicle won't cause any pollution. Honda could roll out 40,000 of these natural-gas cars a year right now. But the demand for them isn't really there yet. Partly that's because owners would have to install what are called "Phill" refueling stations at home. While such a move might seem a little cumbersome for the average homeowner, the price of the investment is certainly sweet. How does paying $1.20/gallon sound in an age when people regularly pay upwards of $3/gallon?