There's good ozone and there's bad ozone. The good kind sits up high up in the stratosphere, protecting us from the sun's ultraviolet rays. The bad kind is formed by burning fossil fuels and is found in the smog in Los Angeles and China.
Bad ozone can cause health problems for children, for the elderly and people with lung diseases like asthma. It can also harm other living things, like plants. But like other greenhouse gases, it is invisible. So it's hard for scientists to show people the effects of bad ozone, which contributes to climate change, said Jack Fishman, professor of earth and atmospheric sciences at Saint Louis University.
To get the message across, in recent years, Fishman and other researchers at SLU set up special gardens funded by NASA to demonstrate how ozone levels affect living organisms. Their work is expanding now that they've received a $91,000 grant from the Environmental Protection Agency to exhibit such plants year-round in "ozone chambers."