The source seems to be here: http://euanmearns.com/co2-intensity-of-electric-cars/
It's unclear on a first skim whether the (constantly rising) energy costs of fossil fuel extraction are included.
It's unclear on a first skim whether the (constantly rising) energy costs of fossil fuel extraction are included.
Also, pretty sure he is not considering the rapid increase in photovoltaic electricity production as the cost is dropping below that of coal, the current cheapest source of electricity.
EDIT: Also carbon capture at the powerplant is definitely easier than at the tail pipe.