I agree that the Prius is a success, and is probably more efficient than the Hummer, but I think the guy's study deserves a closer look and fair hearing. Some of his points may be at least partially valid, such as the nickel mines causing environmental problems. For the number of hybrid vehicles now on the road, their true environmental impact may not yet be totally known. Imagine if every car, truck, tractor, bus, and other equipment were manufactured with the batteries, and then project the vastly increased impacts of the shear numbers of batteries, as compared with the current impacts of the current fleet of vehicles.
Your point about the cost, I agree. However, one important point that is being overlooked here. We are comparing apples and oranges, because we can buy very small cars about the size of the Prius that also get more than 40 mpg highway, without the batteries. I do agree however that the most benefit of hybrid cars are seen in city driving.
I think I mentioned this before, but there is a VW Lupo sold in Europe that gets maybe 70 some mpg, without a battery. It is I think a 3 cylinder diesel that shuts off automatically when coasting or stopped, then restarts automatically. I would like to know why this is not sold in the U.S. Is it the tree huggers or Ralph Nader types that make it a safety hazard or something? I don't know, but I am curious why, because it is one efficient vehicle.
The hybrid cars are catching on to an extent, but it remains to be seen whether the technology holds the potential that some have predicted. The Prius is a success, but what about the other models?
P.S. Heres a link on the Lupo. Now I see they quit making it???!!
http://en.wikipedia.org/wiki/Volkswagen_Lupo