Fuel 2050: Bye, Bye petrol

Conventional fuels are only bound to get more expensive, and that's where Dr Greg Offer comes into the picture. "In the short term, over the next decade, it will be hard for any new fuel sources to challenge our dependence on oil, except biofuels, but they have limits. However, in the long term, within 50 years, it appears to me that it is inevitable that electricity will take over. We don't have a choice, " he says. Buying that Rewa seems like a sound investment now.

Offer, who teaches at the Imperial College of London, states that the rise in oil prices is a straight offshoot of the developing world aspiring for the same level of mobility that the developed world enjoys. "In the long term, beyond 2020, we must shift to alternative fuels such as electricity (whether via batteries or hydrogen doesn't matter), or face declining living standards in richer countries and limits to development elsewhere.