Scientists in eight Arctic nations prepared "a landmark assessment of oil and gas activity" in the region over six years, including "a clear set of recommendations on how to extract safely what are thought to be up to one quarter of the world's energy reserves." But the United States government blocked the report's release, as it prepares "to sell off exploration licenses for the frozen Chukchi Sea off Alaska, one of the last intact habitats of the polar bear." One of the authors of the report said the U.S. move "could be linked to activities in the Chukchi Sea ...