Related by context. Frequent words. (Click for all words.) 71 mountain pine beetle 70 pine beetle 61 bark beetles 55 aspen 53 prolonged drought 53 forest fires 52 wildfires 49 wildland fires 49 forests 48 timber harvest 48 climate change 48 beetle 48 forestry 48 wildfire 46 timber harvesting 46 wildland fire 46 bushfires 45 deforestation 45 grizzly bears 45 Douglas fir 45 floods 45 Dutch elm disease 44 desertification 44 HIV AIDS pandemic 44 noxious weeds 44 rangelands 44 flu pandemic 44 boreal forest 43 hemlocks 43 environmental degradation 43 forest 43 pine forests 43 overgrazing 43 rangeland 43 Forest Service 43 timber 43 gypsy moths 43 elk herd 43 fungal disease 42 global warming 42 infernos 42 spotted owl 42 ranchers 42 urban sprawl 42 Great Recession 42 emerald ash borer 42 pine trees 42 coastal erosion 42 tinder dry 42 roadless rule 42 soil erosion 42 sagebrush 41 epidemic 41 Klamath Basin 41 HIV AIDS epidemic 41 fungus 41 ecosystems 41 disease 41 invasive species 41 AIDS epidemic 41 epidemics 41 conifer 41 gypsy moth 41 semi arid 41 foresters 41 forestlands 41 conifers 41 pandemic 41 bighorns 41 ash trees 41 drought 41 Drought 41 grizzlies 41 sawmills 40 noxious weed 40 devastating floods 40 sage grouse 40 livestock grazing 40 forestland 40 elk 40 snowpack 40 softwood 40 Forests 40 grizzly bear 40 fir trees 40 Lake Tahoe Basin 40 cattle grazing 40 infestation 39 roadless areas 39 firestorms 39 AIDS pandemic 39 bioenergy 39 nose syndrome 39 softwood lumber 39 beetles 39 cropland 39 natural disasters 39 flooding 39 trees 39 infestations 39 watersheds