Related by context. Frequent words. (Click for all words.) 54 heavily polluted 53 polluted 53 polluted waterways 51 notoriously polluted 48 polluted rivers 46 rivers lakes 46 Taihu Lake 42 polluting 42 smoggiest 42 pollution 42 Songhua 41 Algae blooms 41 sewage discharges 41 Drought stricken 40 Songhua river 39 waterways 39 isolated Stalinist 39 Polluted 39 Polluting 39 contaminate groundwater 39 smoggy skies 39 dumping raw sewage 39 overfishing pollution 38 Turkic speaking Muslims 38 POLLUTION 38 toxic chemicals 38 untreated sewage 38 China 37 lakes rivers 37 polluting factories 37 toxic algae blooms 37 NKorea warns 37 pollutes 37 pollute 37 wetland ecosystems 37 rapid industrialization 37 Yangtze river 37 despoiled 37 rapidly industrializing 37 pollutions 37 viewed warily 37 violently suppressed 37 Raw sewage 37 Stormwater runoff 36 Amur River 36 despoliation 36 industrial effluents 36 Rapid urbanization 36 freshwater lakes 36 Toxic chemicals 36 polluted runoff 36 pollute groundwater 36 smog choked 36 suspected carcinogen 36 polluters 36 toxic pollutants 36 lakeshores 36 deplete oxygen 36 pollutants 36 vivid reminders 35 unpolluted 35 Methyl bromide 35 awash 35 Sea otters 35 imperiled 35 rivers 35 brutally oppressed 35 despoiling 35 MasterCard Worldwide advances 35 sewage spills 35 biodiverse 35 reclusive Communist 35 rapid urbanization 35 teeming 35 Diesel exhaust 35 fragile ecology 35 salination 35 contaminating groundwater 35 wastewater discharge 35 sewage overflows 34 bureau rang unanswered 34 befouled 34 red sludge 34 functionally extinct 34 VASCO prime 34 environmentalists 34 sensitive anniversaries 34 contaminate drinking 34 Urban sprawl 34 mercury pollution 34 untreated wastewater 34 seemingly insatiable demand 34 Soil erosion 34 air pollution 34 Three Gorges Dam 34 Benjamin H. Grumbles 34 largest emitter 34 greenhouse gas emitters 34 Neil Carman 34 breakneck 34 rampant deforestation