AdvertisementChina's Smog As Seen From SpaceOctober 23, 2013Eyder PeraltafacebookEmailHeavy smog has shrouded much of eastern China, and air quality levels have been dropped to extremely dangerous levels. The heavy smog is caused by industrial pollution, coal and agricultural burning, and has been trapped by the mountains to the west and wind patterns. The thick haze of smog is clearly visible as the murky gray color in this true color satellite image. (NASA/NOAA)