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The Toxic Smog Cloud Hanging Over Shanghai Looks Just As Bad As It Sounds »

Shanghai is notorious for its terrible air quality, but the smog in this Chinese metropolis just hit absurd levels. The government's air pollution monitoring site records the level of PM2.5, particulate matter hazardous to health, at 477 as of this writing, one of the highest pollution levels ever recorded. Source Main page (current trends)
More about: air pollution monitoring, air quality, particulate matter, Pollution levels