Greenpeace Norway and Young Friends of the Earth argued that development plans at the Breidablikk, Tyrving and Yggdrasil fields, approved by the ministry of energy in 2021 and 2023, are invalid. On Thursday, the Oslo District Court concluded that the impact of combustion emissions must be considered by law, and that no impact assessment of such emissions had been carried out in connection with the decisions in question, it said.The ruling is a breakthrough for environmental groups. In an earlier case, the same two organizations, along with six young climate activists, had argued that allowing oil exploration in the Arctic during a climate crisis breaches fundamental human rights. After failing to persuade the Supreme Court in that case and after a series of appeals, the groups submitted their case to the European Court of Human Rights.Read More: Norway Activists Take Fight on Arctic Drilling to European CourtIn Thursday’s ruling, the state was prohibited from making other decisions that require a valid development plan approval for Breidablikk, Yggdrasil and Tyrving until the validity of the decisions has been legally determined. The state was also ordered to pay court costs.Production at the Breidablikk field in the North Sea started in October. Equinor ASA, which operates the field, said that it isn’t party to the trial and hadn’t had the opportunity to review the judgment, spokesperson Gisle Ledel Johannessen said. While the company said it will deal with the authorities on the matter and their follow-up of the case, Greenpeace was clear on its interpretation of the ruling.“The judgment establishes that the Breidablikk, Yggdrasil and Tyrving oil and gas fields were approved on an illegal basis and that production must be stopped immediately,” Frode Pleym, head of Greenpeace Norway, said in a statement. “We expect a halt to all further developments.”The energy ministry said it will now thoroughly review the judgment together with the government attorney.“We disagree with the judgment and the ruling on temporary injunction,” Energy Minister Terje Aasland said in an emailed statement. “Based on this, we will consider appealing.”Equinor rose 0.5% as of 10:57 a.m. in Oslo, while Aker BP ASA, which is operator for Tyrving, rose 0.6%.The docket number for the case in the Oslo District Court is 23-099330TVI-TOSL/05.