Related by context. Frequent words. (Click for all words.) 61 forests 57 rainforests 56 forest 55 ecosystems 55 rainforest 54 grasslands 54 tropical forests 53 habitat 53 Amazon rainforest 53 woodlands 52 permafrost 52 tundra 52 biodiversity 52 oilsands 52 caribou 51 prairies 51 prairie 51 Alberta oilsands 50 mountain pine beetle 50 Forests 50 wetlands 50 Arctic 49 habitats 49 polar bears 48 tropical forest 48 wildlife habitat 48 pine beetle 48 roadless areas 48 forested 48 forestlands 48 tar sands 47 wildlife habitats 47 grizzly bears 47 marine ecosystems 47 oil sands 47 Wilderness Society 46 Prairies 46 bull trout 46 Northwest Territories 46 oceans 46 species 46 softwood 46 Nature Conservancy 46 wetland 46 Canfor 46 aspen 46 spotted owl 46 wild salmon 46 biosphere 45 watersheds 45 lynx 45 coral reefs 45 pine forests 45 roadless 45 Arctic Ocean 45 Tongass 45 Beaufort Sea 45 forestland 45 Inuit 44 Abitibi 44 Lake Simcoe 44 woodland 44 grassland 44 marine ecosystem 44 deforestation 44 polar regions 44 sage grouse 44 timberlands 43 ecologically sensitive 43 wolverines 43 ecological 43 wilderness 43 ozone layer 43 mangrove forests 43 Voyageurs 43 glaciers 43 coastal wetlands 43 atmospheric carbon dioxide 43 greenhouse gas 43 TimberWest 43 endangered species 43 ecologically 43 greenhouse gases 43 greenhouse gasses 42 Slave Lake 42 Alberta 42 ecosystem 42 Abitibi Consolidated 42 amphibians 42 environmentally sensitive 42 aboriginal 42 Kyoto accord 42 Fort McMurray 42 extinctions 42 Boreal 42 carbon dioxide 42 headwaters 42 Antarctic Peninsula 42 Kyoto protocol 42 Jim Prentice 42 bottom trawling