Representatives for Norway’s government appeared in an Oslo court on Tuesday after environmental groups including Greenpeace brought a case over drilling in the Arctic. Greenpeace, along with environmentalist youth group Natur og Ungdom (Nature and Youth), has sued the Norwegian state over licenses it awarded in 2016 for oil prospecting in the Barents Sea. The Scandinavian country is western Europe’s biggest oil producer. A third group, called the Grandparents Climate Campaign, has also joined the case against the state. The plaintiffs accuse Norway of violating the Paris Agreement on climate change and a section of the country’s constitution amended in...