SLU Center for Environmental Sciences

Saint Louis University's Center for Environmental Science focuses on public education, outreach and research on how human activities are changing the Earth's atmosphere and how these atmospheric changes are impacting the biological environment.

The center focuses on rising tropospheric ozone levels. Due to fossil fuel burning, the amount of background ozone in the air has risen since the beginning of the industrial revolution. While ozone is essential in the stratosphere to protect us from harmful ultraviolet radiation, it is a toxic chemical and, when close to Earth, is harmful to people and plants.

In the Midwestern U.S. and many other parts of the world, background levels of ozone now typically exceed concentrations that are damaging to vegetation on most days during the growing season. This has consequences for natural ecosystems and agriculture.

Jack Fishman, Ph.D., explores the sometimes toxic effects of increased ozone levels on plants. 

St. Louis Ozone Gardens

The desire to educate the public about rising background ozone levels led SLU's Center for Environmental Sciences to create a network of ozone gardens around the St. Louis metropolitan area.

The plants growing in these ozone garden exhibits are all sensitive to ozone air pollution. They show damage if ozone levels are high. Because these plants monitor the health of their environment, they are called "bioindicator" plants.

SLU staff, students and volunteers collect data on the amounts of ozone leaf injury on the plants throughout the growing season. There is also an ozone (O3) monitor and a weather station at each site recording conditions every 15 minutes.

The center partners with organizations throughout the area including the Saint Louis Science Center, the Missouri Botanical Garden, NASA AQAST, the United Congregations of the Metro East, the Madison County Green Schools Program, Grant's Farm, and Southwestern Illinois College-Belleville.


There are currently five ozone gardens throughout the area. You can visit them at the following locations:

  • Saint Louis Science Center’s GROW exhibit
  • Fire station in Granite City, IL
  • Kemper Center for Home Gardening at the Missouri Botanical Garden
  • Grant’s Farm
  • Southwestern Illinois College

Environmental Protection Agency Grants

A group of residents working through the United Congregations of the Metro East (UMC) received an EPA Environmental Justice grant award to fund air pollution education in Granite City, IL as part of the Cleaner, Greener Granite City project. The funding helped install the ozone garden with monitoring equipment at the fire station in west Granite City. They also brought the EPA's Air Quality Flag Program to Granite City schools and community buildings.

The ozone garden at the Missouri Botanical Garden received an EPA Region 7 Environmental Education Grant. This grant funded an expansion of the ozone garden concept with the construction of an indoor "ozone chamber" and related educational activities.