Originally posted by the Voice of America.
Voice of America content is produced by the Voice of America,
a United States federal government-sponsored entity, and is in
the public domain.


               39 Unreported Sources of Air Pollution Discovered

   by George Putic

   Analyzing nine years' worth of data collected by NASA's satellite Aura,
   U.S. and Canadian scientists have discovered [1]39 unreported major
   sources of sulfur dioxide.

   Clusters of coal-burning power plants, smelters, and other oil and gas
   installations were located mostly in Middle Eastern countries but also
   in Mexico and Russia.

   The scientists also said that reported emissions from known sources
   were sometimes much lower than estimates based on satellite-gathered
   data.

   Environment and Climate Change Canada, a part of the Canadian
   government, said that as much as 12 percent of all human-made air
   pollutants are unreported or underreported.

   In addition to that, scientists pinpointed 75 previously unknown
   natural sources of sulfur dioxide, mostly dormant volcanoes.

   According to NASA scientist Nick Krotkov, discoveries were facilitated
   by improvements in computer processing of data collected by the Aura
   satellite.

   [2]Results of the study were published in the online science magazine
   nature.com.
     __________________________________________________________________

   [3]http://www.voanews.com/content/thirty-nine-unreported-sources-air-po
   llution-discovered/3361101.html

References

   1. http://phys.org/news/2016-06-nasa-satellite-unreported-sources-toxic.html
   2. http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2724.html
   3. http://www.voanews.com/content/thirty-nine-unreported-sources-air-pollution-discovered/3361101.html