There is no substitute for oil to run cars and buses - bio fuels are are only a small step with more problems. Nuclear power cannot run cars and buses. It will only produce electricity for homes and industries. We can produce electricity from gas, coal, hydro. Wind and solar electricity generation is picking up. Nobody in the world except India and Iran is now after nuclear energy. Iran has uranium but India has not. So no sense in buying uranium which is much more expensive than gas/KWH electricity produced.
