This document discusses smog and where it comes from. Smog is poor air quality caused by natural or human-made sources. It provides examples of smog in many major cities around the world. Potential sources of smog listed include emissions from factories, power plants, oil and gas extraction, cars and trucks, wildfires, and volcanic eruptions. The document aims to educate about air quality issues and pollutants.
28. This educational resource is a part of
The Air Quality Teaching Box:
www.spark.ucar.edu/air-quality
And is made possible by the University
Corporation for Atmospheric Research (UCAR)
and CIRES at the University of Colorado with
support from NASA DISCOVER-AQ.
To learn more about the types of air pollutants
and how researchers are studying them, visit
www.spark.ucar.edu/air-quality