Air Pollution

Delhi tops most polluted megacity list, says WHO

  1. Source: World Health Organization (WHO)
  2. Delhi’s air is the worst among world megacities
  3. IndiaSpend‘s #breathe network of air-quality sensors reported PM2.5 levels were almost four times above daily safe levels, on average, for the seven-day period from September 22 to 28, 2016
  4. For long-term exposure, these 24-hour levels are nearly 11 times above the WHO health standards
  5. Over the monsoons, Delhi’s air was relatively cleaner because the rain and wind diminished the impact of pollutants
  6. But with the season changing, three of five sensors in the National Capital Region (NCR) registered ‘poor’ to ‘very poor’ air-quality levels
  7. In December 2015, week-long analysis of data from #breathe devices showed Delhi’s air pollution was one-and-a-half times worse than in Beijing

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