No, it wasn't Mother Nature -- it was Brian. And because I was taking a sincere interest in his suggestion, I was just curious whether it is possible to get that much oil from one restaurant, or whether you have to keep stopping at every fast-food restaurant you see and putting in a gallon here and a gallon there.

And, of course, if it became popular to use recycled cooking oil, it would become a matter of patriotic duty to increase our consumption of french fries to increase the supply of fuel. So our air would be cleaner, but we would all be obese and have clogged arteries.

Personally, I like my own invention -- a self-recharging electric car. It runs on batteries just like any electric car, but you also have the battery connected to a small wind turbine on the roof of the car -- as long as you are moving, the wind turbine is charging the battery.