How many people use their e-bike as their sole form of transport?

[onmebike]

Are you sure? That made me think of this Ted Talk about statistics and visualizations. At around 17:20 he mentions the Icelandic volcano vs the CO2 that would have been produced by the planes that were grounded resulted in a carbon neutral volcano.

I can't comment on the validity of his stats but the comment that this was 'the worlds first carbon neutral volcano' made me chuckle!

He's quoting CO2 level's, I think there's more to carbon emissions than just CO2?