Related by context. Frequent words. (Click for all words.) 61 overfishing 58 depletion 58 environmental degradation 57 biodiversity 56 deforestation 55 Overfishing 53 mangrove forests 53 ocean ecosystems 53 dugongs 52 siltation 52 overgrazing 51 overfished 51 extinctions 51 rapid urbanization 50 freshwater 50 marine biodiversity 50 biodiversity conservation 50 eutrophication 50 coral reefs 49 marine ecosystems 49 ecological 49 fisheries 48 extinction 48 acidification 48 bio diversity 48 species 48 fishing fleets 48 coastal ecosystems 47 salinity 47 overpopulation 47 desertification 47 soil erosion 47 mangroves 47 predation 47 coral bleaching 47 urbanization 47 silting 47 ecosystems 46 marine ecosystem 46 anthropogenic 45 mangrove 45 reefs 45 marine turtles 45 habitat 45 IUCN 45 Deforestation 45 carbon sinks 45 mass extinctions 45 bottom trawling 45 scarcities 45 sedimentation 45 corals 45 irrigated agriculture 44 habitats 44 marine ecology 44 biodiverse 44 leatherbacks 44 aquatic ecosystems 44 monocultures 44 estuarine 44 aquaculture 44 Mangroves 43 depleting 43 rice cultivation 43 coastal erosion 43 fishery 43 aquatic species 43 poachers 43 amphibian species 43 bycatch 43 arable land 43 dugong 43 coral species 43 Biodiversity 43 biosphere 43 freshwater fish 43 mortalities 43 transboundary 43 fishers 43 trans boundary 43 Desertification 43 Coral reefs 43 conservation 43 estuaries 42 water hyacinth 42 Urbanization 42 mass extinction 42 poaching 42 droughts 42 scarcity 42 degradation 42 Depletion 42 atmospheric CO2 42 peatland 42 orange roughy 42 ocean acidification 42 unsustainable 41 algal blooms 41 Nature IUCN 41 Biological Diversity 41 paddy cultivation