RE: sand is deadYou may be right with the sands short term, but you are wrong with the electro cars. It is not so easy as you think. Do you like to buy a car with a range of 100 miles only? Ha ha, no way for electric cars the next 30 j. - its not possible to store large amounts of energy in an electrical storage cell and will never be, read a book about physiks, do your dd.....
regards
Steve