this is going in the right direction to replace gas and diesel. but all the talk about the gas burners doing damage to the earth is just ignorant. with the cars of today it take 15 to 20 to equal what 1 car in the 80's put out. so the older cars will go away by attrition. (beside that the earth is moving closer to the sun any way so it will get warmer) the thing with batterys is what do we do with them when thay are done . the cost to recycle batterys back to batterys is expensive. then when everyone goes home to charge there cars the power usage would be so grate that the power plant would put more pollution out then the cars do now. in a battery powered car if the connetions just get a little corroded the efficiency go down. yes hydrogen may be a little pricuy now but if the oil companies would get together it would probably come down and besides the internal combustion engine can be converted easily and the only by produce if burning it is water .