Air Pollution: The World's Biggest Environmental Health Risk

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  • Disproportionate Effects
  • Unequal Exposure
  • City Air
  • A Call to Action
  • The Causes
  • A Threat to Children
  • Strategies and Solutions
  • Next Steps
  • What's in the Air?
  • International Crisis
  • Regions Hit the Hardest
  • Damaging Our Health
  • The Most Vulnerable

City Air

As for the U.S. metropolitan areas that fare the worst, Los Angeles; Cincinnati, Ohio; St. Louis and Fresno, California, are among the cities with dangerous levels of toxic compounds and large concentrations of poor people of color.

(Photo: Jonathan Alcorn/Bloomberg via Getty Images)

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