Related by context. Frequent words. (Click for all words.) 66 smoggy 59 smog 45 snarled traffic 44 megalopolis 44 thick haze 44 smoke belching 44 air pollution 44 potholed streets 43 polluted 43 metropolis 42 clogged highways 42 congested 42 traffic jams 41 sprawling metropolis 41 skyscrapers 41 sooty 40 grimy 40 haze 40 bustling 40 metropolises 40 eerily empty 40 freeways 39 uncollected garbage 39 gleaming skyscrapers 39 Smog 39 blanketed 39 gridlocked 39 eerily quiet 39 airborne pollutants 39 clogged 39 dusty 39 soupy 39 pollution 39 hutongs 38 litter strewn 38 leafy 38 soot 37 particulate pollution 37 subways buses 37 polluting factories 37 foul smelling 37 heat trapping 37 exhaust fumes 37 cobblestoned 37 sprawling 36 neon lit 36 Thick smoke 36 thoroughfares 36 traffic snarls 36 snowless 36 neon lights 36 garbage dumps 36 Thick fog 36 congested highways 36 boulevard 36 streetlamps 36 pedestrian plazas 36 main thoroughfares 36 gridlock 36 smoky 35 subways 35 thick layer 35 Traffic jams 35 crowded 35 acrid smoke 35 cities 35 peat bog fires 35 greenhouse gas emitter 35 stifling humidity 35 teeming 35 smelly 35 Freeways 35 trash strewn 35 vibrant nightlife 35 stinky 35 blue sky 35 superhighways 35 gray skies 35 muggy 35 garbage strewn 35 densely packed 35 blanketing 34 nitrogen dioxide 34 smoke plumes 34 verdant 34 densest 34 dreary 34 smoky haze 34 boulevards 34 swelter 34 streets 34 Dense fog 34 bustling metropolis 34 particle pollution 34 heat trapping carbon dioxide 34 diesel fumes 34 tree lined 34 alleyways 34 pollutants 34 backstreets 34 ozone concentrations