The Sweden's capital upcoming low-emission zone will only permit use of electric cars and gas cars that meet the Euro 6 emission standards. Euro 6 plug-in hybrid heavy vehicles will also be permitted. The zone is in effect 24 hours a day, 7 days a week. Violating the rules of the zone is a traffic offence which can result in a police fine of SEK 1,000, i.e. roughly €85.

Air pollution in the city of Stockholm has been a long-standing problem. Medical research shows that children living near Stockholm streets with high emissions have reduced lung function from as early as six months of age.