I had one of those in the 80's, I only had small problems with it, went plenty fast, great mileage, always started in the winter ( if the block heater was used). drove it for 80K mi. over six years, even solved the fuel gel problem. I live where it gets very cold sometimes, it never let me down. GM's lack of support was it's biggest problem and other owners thinking it was a gas engine, diesels are different.

I guess it was included didn't know Edison Cell was also nickel-iron cell.

You also add weight, and many more expensive parts to break down. Plus the alternator is not 100% efficent, nor would the motor nessary to drive the AC.

What a great idea,replace a reasonably priced, dangerous lead-acid battery with one which will have a couple pounds of metal that will explode if it gets wet; and will cost an "arm and leg" to replace. Also, don't expect the explosion to be small.

"Iron tapped from the blast furnace is pig iron, and contains significant amounts of carbon and silicon." "http://en.wikipedia.org/wiki/Finery_forge". Did the tour show you how to make pig iron into steel? In theory it's easy to do, but to actually do it is near impossible.

Making steel is very hard to do using primitive tools, what you will make, if lucky is pig iron or cast iron, neither of which is steel.

CO2 is toxic so is oxygen and nitrogen. I don't need wikipeda to see CO2 will kill, just stick a plastic bag over your head for ten minutes or so. Now for your toxic theory; since CO2 can be toxic, it must be bad. Can't the same illogical argument be made for any gas? CO2 is needed for life as we know it, so is oxygen, don't fear either because of being toxic.

I had an old farmhouse for 30 Years with steep (45 degree) slate roof, lots of repair people had to walk on it (a lot of brick chimney repair and flashing, very little slate repair), some without ropes. No one ever broke one by walking on them. Personally, since they are all held in with two loose nails, I though one should slip out when stepping on them; but none ever did.