Related by context. Frequent words. (Click for all words.) 61 polar bears 57 polar bear 52 habitat 51 sea otters 51 Arctic 50 Chukchi Sea 50 marine ecosystems 50 Endangered Species Act 50 marine mammals 49 Arctic Ocean 48 walruses 47 grizzly bears 47 sage grouse 47 Beaufort Sea 47 ecosystems 47 walrus 47 endangered species 47 caribou 46 habitats 45 Polar bears 45 roadless areas 44 polar regions 44 coastal wetlands 44 grizzlies 44 wildlife habitat 44 oceans 44 species 44 mammals 43 Outer Continental Shelf 43 whales 43 coral reefs 43 wildlife habitats 43 ocean acidification 43 wildlife refuge 43 National Marine Fisheries 42 lynx 42 NOAA Fisheries 42 marine mammal 42 manatee 41 wetlands 41 wildlife 41 tundra 41 manatees 41 ANWR 41 biosphere 41 coastal waters 41 sea turtles 41 grizzly bear 41 glaciers 41 Minerals Management 41 humpbacks 40 wildlife refuges 40 grizzly 40 roadless 40 corals 40 Cook Inlet 40 carnivore 40 humpback whales 40 NMFS 40 spotted owl 40 mammal 39 reefs 39 Antarctic ice 39 Wildlife Service 39 FWS 39 Wilderness Society 39 gray whales 39 fauna 39 penguins 39 Antarctic 39 gray wolves 39 bluefin tuna 39 global warming 39 krill 39 Alberta oilsands 39 Biological Diversity 39 polar ice 39 biodiversity 39 orcas 39 otters 39 shorebirds 39 amphibians 39 oilsands 38 atmospheric carbon dioxide 38 Great Barrier Reef 38 North Slope 38 killer whales 38 permafrost 38 Amazon rainforest 38 fisheries 38 watersheds 38 Antarctica 38 wild salmon 38 oceanic 38 endangered 38 warming 38 NOAA 38 coalbed methane 38 offshore drilling 38 Greenland ice 38 whale