SMOGWhat it looks like

and where it comes from.

Poor air quality, whether natural or human-caused,

is called smog.

What does smog look like?

Smog in Boulder, CO, USA

UCAR

Smog in Denver, CO, USA

UCAR

Smog in San Francisco, CA, USA

wikipedia

Smog in New York City, NY, USA

EPA

Smog in New York City, NY, USA

wikipedia

Smog in Los Angeles, CA, USA

NASA

Smog in Mexico City, Mexico

UCAR

Smog in Mexico City, Mexico

UCAR

Smog in Beijing, China

wikipedia

Smog in Beijing, China

wikipedia

Smog in Athens, Greece

wikipedia

Smog in Sao Paulo, Brazil

wikipedia

Where does smog come from?

wikipedia

Emissions from factories

UCAR

Emissions from factories

UCAR

Emissions from oil refineries

UCAR

Emissions from power plants

wikipedia

Emissions from burning car batteries

EPA

Burning grasslands and forests

UCAR

Emissions from oil and gas wells

UCAR

Emissions from offshore wells.

NASA

Emissions from cars and trucks

colorado.gov

Emissions from wildfires

State of Nebraska

Emissions from wildfires seen from space

NASA

Emissions from volcanic eruptions

wikipedia

This educational resource is a part of The Air Quality Teaching Box:www.spark.ucar.edu/air-qualityAnd 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