Environment Minister Isabella Lövin, of the Green Party, told reporters at a press conference that the potential climate impact of the expansion is so great, the government must weigh in.
The expansion would allow oil company Preem to refine more crude oil at its site in Lysekil and create some 150 new jobs. But the refinery would also see its C02 emission double and, as a result, become Sweden's largest single emitter of greenhouse gases.
The case was making its way through the Land and Environment Appeals Court. But now, the court will still hear the case and issue an opinion but it's the government who'll have the final say.