Norway's plug-in electric vehicle market grew 22% last month with 3,622 cars registered and year-to-date numbers growing at 33%, according to data from the European Alternative Fuels Observatory (EAFO).

BMW's i3 was the best selling model, with 503 units, followed by two plug-in hybrids, the Mitsubishi Outlander PHEV, with 360 registrations, and the Volkswagen Passat GTE, with 338 units, its best result in six months.

Hyundai's Ioniq Electric vehicle registered 66 units in its full sales month.

In the year-to-date ranking, Mitsubishi Outlander PHEV had 4,490 units, Volkswagen's e-Golf had 4,236 registrations, while the Nissan Leaf was 3.667 units and VW's Golf GTE had 3,654 units.

Data from just-auto's Qube service shows carbon footprint of plug-in cars actually declines over time as power grids everywhere gradually lower the carbon required to produce 1 kWh of electricity.

Vehicles fuelled on hydrocarbons, however, are largely immune to that decline unless they run exclusively on synthetic fuels or biofuels–which have their own wells-to-wheel carbon challenges.

EAFO is a European Commission-funded initiative which provides free information to support Member States with the implementation of EU Directive 2014/94 on the deployment of alternative fuels infrastructure.

Targeted alternative fuels are electricity, hydrogen and natural gas – both liquefied and compressed

Geographical scope is all EU Member States plus EFTA members, as well as Turkey.