A controversial study says Hummer could be better the planet than a Prius. How can that be the true?

Reasons why the Prius might not be as good on the envornment as you think. The total energy used to build, desing and ship, and dispose of a vehicle all contributes to this factor. The prius wieghs in at $2.19 per mile while the Jeep Wrangler is the lowest at $.65 cents per mile, and the Toyota Tacoma a close second at $.97 cents per mile. Other factors that contribute to the high per mileage factor are the battery and lack of recycycling programs. Bottom line weigh in all the factors before making a purchase.