One other thing-
-personnally, I don't think there is an answer. If you run the car on corn (ethanol) you still have emissions and there are less BTU's per volume. Run on hydrogen and it takes an awfully lot of energy to split water molecules to create hydrogen. Run on electricity, pollution from dead batteries and pollution from power plants. There is no good answer, and this is where you ultimately unveil the 'greenies' point. In the end, it's not about going to a better energy source, it's about control. Just like every other group out there. I gauantee you that the moment we switched every car over to hybrids, they'd @#!%& about the battery pollution. Switch to electric cars, same thing; and so on and so forth. Ultimately, it's about controlling the majority with what a particular group feels is 'right'.
On a side note, I also am an avid ATVer. And I run into the same thing there. Here in Minnesota, greenies complained about people riding in ditches in the spring during the wet season. So ATVer's had to stop riding in the ditches in the spring. Then it was riding in ditches at all. So no more riding in ditches at all. Then the snowmobile trails in the summer. Then old logging trails. Then backyard marshes. Each time, they claimed it was just that one thing, and then nature would be fine. But the moment they over one hill, they set they're sights on the next. Because ultimately, they don't want you there at all.
Cheers,
Rich
PS Could someone email me with a description of 'zero point' energy? Never heard of that one.