Two environmental groups said on Monday they were trying to take the Norwegian state to the Supreme Court for granting oil licences in the Arctic.
Greenpeace and Natur og Ungdom (Nature and Youth) say oil drilling licences granted to companies in 2016 should be cancelled because they violate Norway's constitution, which includes a right to a healthy environment.
They say emissions from oil activities and fossil fuels jeopardise the objectives of the Paris Agreement, which aims to limit warming from climate change to less than 2 degrees Celsius, compared with pre-industrial temperatures.
However, the organisations have already suffered two legal setbacks in both an Oslo district court and an appeals court, which ruled that their concerns were hypothetical as there was no certainty fossil fuels would be discovered.
However, the appeals court judges said CO2 emissions from Norwegian oil should be taken as a whole -- meaning not only emissions from the production but also from the use of oil and petrol even outside the country.
"Opening up the pristine areas in the Arctic for oil drilling in the time of climate emergency is not acceptable," Greenpeace Norway head Frode Pleym said in a statement.
"The use of oil and gas produced in Norway and burned elsewhere contributes to 10 times the domestic emissions of Norway."