Related by context. Frequent words. (Click for all words.) 50 Soil erosion 50 forest 48 beetle infestation 47 insect infestations 46 hemlock trees 46 pine beetle infestation 45 Illegal logging 45 forests 45 Invasive plants 44 Prescribed burns 44 veld fires 44 catastrophic wildfires 44 rampant deforestation 44 insect infestation 44 Boreal forest 43 dense brush 43 Salmon Challis National 43 Controlled burns 43 dieback 43 soil erosion 43 prunings 43 forest thinning 42 forest fires 42 forestry 42 sawlogs 42 woody debris 42 barrens 41 invasive insect 41 deadfall 41 forest ecosystems 41 Gypsy moths 41 lodgepole 41 trees 41 timber harvests 41 Invasive species 41 mountain pine beetles 41 bark beetle infestation 41 reforestation 41 spotted owl habitat 41 bark beetle 41 hemlocks 40 hogweed 40 toxic algae blooms 40 Mountain Pine Beetle 40 reforesting 40 woodlands 40 oak wilt 40 gypsy moth caterpillars 40 pine beetle 40 environmental degradation 40 forestlands 40 wildfire suppression 40 owl habitat 40 timber harvesting 40 pine beetle epidemic 40 silviculture 40 ecological degradation 40 sequoias 39 erosion 39 anthracnose 39 Ponderosa pine 39 cankers 39 replant trees 39 sagebrush habitat 39 hardwood trees 39 pine beetles 39 tamarack 39 softwoods 39 root rot 39 lodgepole pine 39 mountain caribou 39 vegetation 39 grassland habitat 38 peat fires 38 overharvesting 38 seagrasses 38 replanting 38 habitat degradation 38 timbering 38 adelgid 38 Amazonian rainforest 38 longleaf pines 38 foresters 38 ash trees 38 clearcuts 38 pest infestation 38 overgrazing 38 pine forest 38 fungus 38 hemlock woolly adelgid 38 habitat fragmentation 38 timber harvest 38 jack pine 38 ponderosa pines 38 understory 38 pine trees 38 pine seedlings 38 peat bog fires 38 invasive alien 38 clearcutting 38 felling