I'm a diehard petrolhead and its my intention to always keep 1 gallon of fuel for a last hurrah on the day when all other fossil fuels are gone, but we do all have acknowledge that changes are acoming, re. climate. While I'm fairly evenly sceptical about both radical climate change doomsayers and those that deny it, the reality is that we have to consider and contribute to reducing the impact we have on the environment around us and the rate of our use of finite resources. If the climate change folks are right, and if we can't make hard decisions, the only choice may be to decide whether we want to choke (Go Diesel!) or burn (higher CO2 Petrol).... Either way, we're dead :).