Related by context. Frequent words. (Click for all words.) 63 Urban sprawl 56 suburban sprawl 53 urban sprawl 52 suburbanization 51 Invasive species 51 Gypsy moths 49 sprawl 46 Feral hogs 44 Illegal dumping 44 exurban 44 Global warming 44 suburbia 44 beetle infestation 44 habitat fragmentation 44 blight 43 Overcapacity 43 Overpopulation 43 honeybee population 43 Partisan politics 43 deindustrialization 43 urban blight 43 Droughts 43 tinder dry brush 43 Urbanization 42 Antibiotic resistance 42 overharvesting 42 Overfishing 42 urban decay 42 postindustrial 42 overhunting 42 pine beetle infestation 41 nutrient runoff 41 urbanization 41 rampant consumerism 41 croplands 41 ecological degradation 41 Nickelsburg 41 Infestations 41 bee populations 41 McMansions 41 gypsy moth caterpillars 40 downtowns 40 catastrophic wildfires 40 strip malls 40 environmental degradation 40 Pandemic flu 40 Declining enrollment 40 Encroachments 40 urban 40 burb 40 smokestack industries 40 freshwater ecosystems 39 spotted knapweed 39 buildable land 39 Canker 39 Severe drought 39 semirural 39 overpopulation 39 overfishing pollution 39 loosestrife 39 unaffordability 39 insect infestations 39 Anhydrous ammonia 39 exurb 39 Partisanship 39 tinder dry forest 39 farmland 39 farmlands 39 Rust Belt 39 large swaths 39 habitat degradation 39 congested roadways 39 insect populations 39 Suburbanites 39 tidal wetlands 39 Predatory lending 39 pesky insects 39 unsightliness 39 depopulating 39 developable land 39 overconsumption 38 Unseasonably warm weather 38 Skyrocketing 38 bark beetle infestation 38 Baby boomer 38 greenbelts 38 invasive pest 38 oak woodlands 38 timber harvests 38 NIMBYism 38 Distracted driving 38 nutrient pollution 38 cropland 38 invasive weed 38 suburbanites 38 exurbs 38 pest infestations 38 aridity 38 Downturns 38 rapid urbanization 38 Large swaths