While the promise sounds great, it's important to note that no law has actually been passed. Also, incentives to increase sales of electric vehicles are yet to be announced. Denmark's Scandinavian neighbour Norway is on the other side of the spectrum. Heavy subsidisation has caused every 2nd (!) car sold to be electric ( https://www.reuters.com/article/us-environment-norway-autos/... ).
Isn't it ironic that most of welfare and subsidies actually come from the oil. Stuff like 25km of under sea tunnel leading to a town with sub 2k population is quite a common sight there. While Norway is an amazing country in many aspects, the amount of oil owned by a state company puts it in a rather unique position.
State wealthfare fund and research in various techniques to minimize pollution from oil production.