Related by context. Frequent words. (Click for all words.) 50 overfishing pollution 47 Melting glaciers 46 whales seals 45 polar bears 45 frogs toads 45 dolphins whales 45 ribbon seals 44 aquatic ecosystems 44 Invasive plants 44 habitat fragmentation 44 habitat degradation 44 marbled murrelets 44 polar bear populations 44 aquatic habitats 43 Benjamin H. Grumbles 43 Puget Sound orcas 43 conserve biodiversity 43 snowy plovers 42 Mexican spotted owl 42 insect borne diseases 42 seals sea lions 42 newborn pups 42 overhunting 42 Wildfires burn 42 biodiversity hotspots 42 species extinctions 42 conserving biodiversity 42 adverse impacts 42 habitats 42 ringed seals 42 climate change 42 subsistence hunters 42 ocean acidity 42 freshwater ecosystems 42 harm 42 ocean acidification 42 Steller sea lions 41 Radiation leaks 41 Inuits 41 Sea otters 41 Adelie penguins 40 preindustrial levels 40 deplete oxygen 40 worsening droughts 40 dugongs 40 drier summers 40 Cook Inlet belugas 40 ecosystems 40 loggerhead sea turtles 40 harass abuse 40 Soil erosion 40 frequent droughts 40 global warming 39 Whale sharks 39 pollutants 39 subtropical regions 39 coastal ecosystems 39 malaria cholera 39 endangered species 39 Global warming 39 marine mammals 39 whales dolphins 39 waterbirds 39 sulfur dioxide nitrogen oxide 39 salination 39 overexploitation 39 floods droughts 39 Beluga whales 39 spiny dogfish 39 Rapid urbanization 39 caribou herds 39 narwhals 39 mold fungi 38 Inuit 38 pikas 38 melting polar 38 Thoroughly cooking 38 campaigning proselytizing harassment 38 toxicants 38 Invasive species 38 bioaccumulation 38 woodland caribou 38 endangered 38 livelihoods 38 radiological emergencies 38 sea otters 38 Toxic chemicals 38 Minke whales 38 Sheila Watt Cloutier 38 endocrine disruption 38 hazards 38 fragile ecology 38 subsistence hunting 38 grassland birds 38 rampant deforestation 38 endocrine disrupting chemicals 38 hormone disrupting 38 federally endangered species 38 blue footed boobies 38 giant tortoises 38 harmful