I know that I'll be called naive or hypocritical, or both. The world needs oil and we all drive cars. But things are changing at impressive speed. Silicon Valley is building more electric vehicles than you can shake a stick at. Batteries are getting better all the time and soon will be in our homes and businesses. It's not hard to imagine a future where the petrol pump is a museum exhibit that children will be boggled by. But Shell wants us to believe that this vision of the future is impossible, that renewable energy is a passing fad.