The board of Russia’s Norilsk Nickel called on shareholders to discuss a proposed change to its dividend policy as the palladium and nickel producer looks to invest more in production and environmental protection after a major fuel spill in the Arctic.

Nornickel, the world’s largest producer of palladium and a leading producer of nickel, has been fined $2-billion for the damage caused by the spill last year in the country’s worst environmental disaster in the Arctic.