Arctic Ocean relate to the radioactive contamination of the Arctic Ocean from, for example, Russian radioactive waste dump sites in the Kara Sea and Cold War nuclear test sites such as Novaya Zemlya. In addition, Shell planned to drill exploratory wells in the Chukchi and Beaufort seas during the summer of 2012, which environmental groups filed a lawsuit about in an attempt to protect native communities, endangered wildlife, and the Arctic Ocean in the event of a major oil spill. On 16 July 2015, five nations (United States of America, Russia, Canada, Norway, Denmark/Greenland) signed a declaration committing to keep their fishing
Severnaya Zemlya Glacier on the island of October Revolution with its terminus at Matusevich Fjord. October Revolution, with seven glaciers, is the island with most individual glaciers in Severnaya Zemlya. Next are the islands of Bolshevik with six, Komsomolets with four, Pioneer with two and Schmidt Island with one. The largest glacier is the Academy of Sciences Glacier in Komsomolets, which is also the largest ice cap of Russia —a and thick ice dome reaching above sea level covering about two-thirds of the surface of the island. October Revolution Island (, "Ostrov Oktyabrskoy Revolyutsii") is the largest island of the Severnaya Zemlya