text: why is it taking so long to develop and implement alternate sources of fuel? cars go on alcohol and it's cleaner.  what's the hold up? from consumer's side: if you're asked by the goverment to buy a new car and sell your old (which will be hard to sell since noone will buy a car that cannot be used since government restrict the old oil-based car) would you want to do it? without any doubt?   if you have a car that you like very much either because it's your only car or because you have a memory with it, are you willing to sell it for a very low price because they can't be run because of "high pollution level"?  would i sell my car as a rusted old steels?  from car manufacturer's side: since government has restricted oil-based car, will i have enough time to design, publicise, make, and mass produce a car that runs on alternative fuels? will i be able to produce it on a reasonable price because researching the new technology would need cost?  from government side: would this shift affect the country's relationship with other countries cause we don't buy their oils anymore? would this shift worth as much as the cost needed?  from fuel producer side: well, the whole country has have gas station for oil, i've made a lot of investment on that, would i buy a whole new gas station kit for alternative fuel for the whole country's gas station that i have? in how many years would that change return me the investment i made, perhaps 100 years?   so shifting quickly brings more bad effect than good effect, there should be a transition phase such that: fully oil using -> self decision on using alt fuel -> government encouragement -> hybrid phase -> government banning of oil based cars