I've been having a discussion with a collegue about pollution of vehicles and general transport issues. Her standpoint is that if everyone in the UK switched to electric cars tomorrow, the world would be a better place as there would be no emissions. What she fails to realise is that energy cannot be created or destroyed, it can only change it's form. Just because one may plug their car in to a wall socket at night, doesn't mean that no emissions are produced anywhere along the line. I was wondering just how many power stations would need to be built if the UK were to do what she suggests (assuming their was a viable electric car for us to buy). Just looking at the problems the electricity companies are facing with the increased use of home air-con units suggests that the current infrastructure would never be able to provide for a fully-electric car society. I was also wondering how much hydrocarbon pollutants would be produced to fully recharge an electric car for say a range of 200 miles versus the amount produced by a modern petrol engine covering the same 200 miles. I rekon the figures would not be dissimilar (assuming traditional methods of electricity production ie. non-nuclear, non-renewable). Of course I have no evidence to back this theory up however.