text: From consumer's side:\nIf 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? \n\nIf 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"?\n\nWould I sell my car as a rusted old steels?\n\nFrom car manufacturer's side:\nSince 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?\n\nFrom government side:\nWould 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?\n\nFrom fuel producer side:\nWell, 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? \n\nSo shifting quickly brings more bad effect than good effect, there should be a transition phase such that:\nFully oil using ->\nSelf decision on using alt fuel ->\nGovernment encouragement ->\nHybrid phase ->\nGovernment Banning of oil based cars