Summary #750

Which city is most polluted? No one knows
  • There is not enough data about PM2.5 -- pollution associated with $3 trillion in health costs in 2015.
  • It can’t be collected because there’s not enough equipment monitoring the air quality -- for example, India has only 1 monitor per 6.8 million people.
  • Study authors indicate that, because of this, any rankings of most polluted cities are simply not based on enough data to be true.
  • For accurate measurements, it would take 1 monitor per 1 million people around the world joined in an integrated monitoring framework.
  • Achieving this goal would enable more precise atmospheric modeling and air quality forecasting.


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