… unless you can guarantee the electricity comes from a 100% renewable source.

It frustrates me that much of the recent press coverage describes electric vehicles as zero-carbon as they are obviously not – their carbon performance should be rated as the average emissions from the mains electricity of that particular country. “Zero-emissions” is just greenwash and it should stop now before the inevitable backlash.

My second frustration is trying to get an accurate estimation of what those emissions are. Just this weekend I have seen quotes suggesting that they are roughly the same as the petrol equivalent, that they are 40% more efficient and in one case (the Tesla sports car) just 25% of a small petrol sports car. Not all of these can be right.

We need a proper method of calculating these emissions and we need it now.