I check the usual rental places like Hertz, Avis, Budget, and Thrifty. The cheapest one I found is an off airport location in Chicago (something called Advantage Car Rental). After my fiasco with Enterprise in Boston and not being able to find the damn return place, I've decided to only rent from on-airport rental companies. I don't care if it's more expensive.
In this case, the off airport company was $2 cheaper. Whatever. The cheapest on airport company was Budget. The quote I got was $107 for an economy car. Fine by me. I decided to check to see if anyone had hybrids.
Several companies had hybrids available and they were all over $500 for the four days we needed the car. Isn't that a bit crazy? Sorry, but I'm going with the $107 rental this time. I am all for helping the environment, but with a price difference that high... environment, you lose this time. I fully expect to see Iron Eyes Cody crying as I drive off the O'Hare lot with my Hyundai Accent (or similar) car.