Related by context. Frequent words. (Click for all words.) 40 seabirds 40 coastal waters 38 Global warming 38 marine ecosystems 38 oceans 38 polar bears 37 ocean 37 Polar bears 36 shipping lanes 35 inland lakes 35 Bering Sea 35 arctic 35 Arctic 35 coastlines 34 estuary 34 Pollution 34 estuaries 34 ecological 34 sea 33 Warmer temperatures 33 air pollution 33 ice floes 32 Arctic Ocean 32 recreational boaters 32 shorelines 32 spawning grounds 32 pollution 31 waterway 31 warmer temperatures 31 manmade 31 biodiversity 30 overpopulation 30 global warming 30 waterways 30 reefs 30 shoal 30 Warmer weather 30 acid rain 30 tropics 29 shoreline 29 extinctions 29 Warm weather 29 climate change 29 Caspian Sea 29 Antarctica 29 seas 29 trawlers 29 Antarctic ice 28 waters 28 Freezing temperatures 28 ecosystems 28 tidal 28 mud flats 28 Atlantic Ocean 28 melting ice 28 acidification 28 undersea 28 Baltic Sea 28 polar ice 28 Northwest Passage 28 anthropogenic 27 Skyrocketing 27 ocean acidification 27 atmospheric carbon dioxide 27 mass extinction 27 coasts 27 urbanization 27 Mediterranean Sea 26 shallow waters 26 Greenland ice 26 crop yields 26 coastline 26 melting glaciers 26 maritime 26 Carbon dioxide 26 warmer 26 glaciers 26 Wind turbines 26 littoral 25 oyster beds 25 Glaciers 25 Environmentalists 25 St. Lawrence Seaway 25 planet 25 Cooler weather 25 obesity epidemic 25 Warming 25 icebergs 24 harbor 24 strait 24 shoals 24 coastal erosion 24 greenhouse gases 24 greenhouse gasses 24 Swine flu 24 Drought 24 Wet weather 24 Caspian 24 heatwaves 24 cargo ships 23 container ships