Related by context. Frequent words. (Click for all words.) 61 forests 61 tropical forests 58 boreal forest 54 rainforests 52 uplands 52 deforestation 52 biodiversity 52 forest 51 wetlands 51 wetland 51 woodlands 51 permafrost 50 grasslands 50 grassland 50 tropical forest 50 methane 49 carbon dioxide 49 habitats 49 forestland 48 coral reefs 48 CO2 47 marine ecosystems 47 carbon dioxide CO2 47 rainforest 47 ecosystems 46 vegetation 46 cropland 46 habitat 46 soils 46 wildlife habitats 46 Amazon rainforest 46 Deforestation 45 greenhouse gas 45 atmospheric carbon dioxide 44 catchments 44 reforestation 44 glaciers 44 palm oil 44 mangrove 44 wildlife habitat 44 woodland 44 Forests 44 carbon sequestration 43 afforestation 43 coalbed methane 43 greenhouse gasses 43 watersheds 43 soil erosion 42 catchment 42 bio diversity 42 ozone layer 42 hectares 42 reefs 42 corals 42 biomass 42 Wetlands 42 mangroves 42 REDD 42 forest fires 41 forestry 41 pine forests 41 greenhouse gases 41 Antarctic ice 41 forested 41 Greenland ice 40 arable land 40 coal seams 40 timber 40 biosphere 40 tundra 40 Borneo 40 replanting 40 Kalimantan 40 rangeland 40 coral reef 40 ecological 39 flora 39 sq km 39 conifers 39 landmass 39 coastal erosion 39 Carbon dioxide 39 arable 39 soil fertility 39 ecologically 39 oceans 39 volcanic eruptions 38 river basins 38 species 38 peat 38 sediment 38 marshland 38 fisheries 38 topsoil 38 sediments 38 desertification 38 Wetland 38 timberland 38 nitrogen 38 extinctions 38 estuaries