Bio fuels and hybrids i guess... we got a good 400 years worth of oil left... I think...
Plenty of other sources, electricty and the like but its unlikely to happen until oil has totaly run out with the way the oil and car markets are run. Everytime an electric car is introduced its killed off by the oil companies or its simply not up to scratch and not bought by the consumer.
Personaly... Mad Max world!! mad people in cars and armoured fuel tankers!!!!!!!
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