I have to laugh, people still point to that completely discredited "research report" when they want to feel good about driving their Hummers. Look, the report assumes that for every one Hummer you have to build, ship, drive and dipose of three Prius's becuase, according to the report, a Prius only lasts 109,000 miles (and the Hummer lasts 300,000 miles). This is completely false, and just a made up way to come up with a method of discrediting the Prius. Many Prius's have lasted far more than 300,000 miles, and I have never heard of one only lasting about 100K miles (and the battery's that everyone thought would only last 100,000 miles, they're lasting longer than most traditional cars last). Also, it's interesting that the first Prius was built in 1997, and yet somehow they claim production of it's battery caused so much pollution that back in the late 1960s and early 1970s they tested the moon rover near the plant that made the batteries. Funny, I had not yet been informed that time travel is possible. Guess I missed the memo. Also, that battery is 90% recyclable. I could go on and on about why that report is bogus, but believe me now when I say, you cannot believe all the bullsh*t written on the internet.