So I was reading of Stuff this morning that an author has published a report that electric cars transfer the pollution to the power station (report written by Clive Matthew-Wilson, entitles 'The Emperors New Car).
http://www.stuff.co.nz/business/3519686/Electric-cars-simply-transfer-pollution-to-power-station
Whilst I know this is mostly true, from what I can find out a typical internal combustion engine operates at about 20% average efficiency, and from what I remember reading somewhere else (can't remember where now so numbers have to be taken with a grain of salt) the best that they can hope to get it to is early 30's.
However, even the lowly coal powered station operates at an average efficiency of around 33% and gas-fired around 50%. And considering 2/3 of NZ’s market is made up of renewable energy, surely this is just scare tactics... or have I missed something?