Related by context. Frequent words. (Click for all words.) 75 polluted 64 polluted rivers 58 Taihu Lake 57 pollution 57 Polluted 57 polluted waterways 55 polluting 54 pollutants 52 smoggiest 52 rivers 51 air pollution 51 polluted groundwater 50 pollutions 50 waterways 49 polluting factories 49 toxic waste 49 toxic pollutants 49 rivers lakes 49 smoggy 49 toxic wastes 49 pollutant 49 Large swathes 49 Superfund sites 49 Songhua 49 contaminated 48 river deltas 48 pollute 48 industrial effluents 48 arsenic mercury 47 Toxic chemicals 47 unpolluted 47 Huaihe River 47 Polluting 47 arsenic contamination 47 Raw sewage 47 wastewater discharges 47 drinkable water 46 Pollution 46 Yangtze river 46 particulate pollution 46 riverbanks 46 raw sewage 46 polluting industries 46 carcinogenic chemicals 46 untreated sewage 45 sewage discharges 45 sewage 45 red sludge 45 smog choked 45 Linfen 45 undrinkable 45 groundwater 45 turbid 45 rubbish dumps 45 Pollutants 45 toxic chemicals 45 effluents 45 Superfund site 44 densely populated 44 Amur River 44 poisonous chemicals 44 silt 44 gray haze 44 contaminated groundwater 44 contaminated soils 44 uncollected garbage 44 hazardous 44 soot particles 44 garbage dumps 44 megacities 44 river 44 toxic sludge 44 water 43 wastewater discharge 43 sulfuric 43 waterbodies 43 untreated wastewater 43 polluters 43 pollutes 43 lakes 43 total dissolved solids 43 effluent 43 sewage overflows 43 contaminate groundwater 43 stagnant pools 43 acid rain 43 river basin 43 harmful contaminants 43 tributaries 43 toxic substances 43 fecal coliform bacteria 43 contaminants 43 foul smelling 43 airborne pollutants 43 dischargers 43 overflowing rivers 42 smog 42 waterborne disease 42 sulfur dioxide 42 contaminated sediments 42 mercury pollution