Plant physiologist Joe Miller (left) and plant pathologist Allen Heagle discuss an experiment at the ARS’ Air Quality-Plant Growth and Development Research Unit, in Raleigh, North Carolina. They grow the plants in these open-top chambers so they can add extra ozone or carbon dioxide to the air surrounding the plants—or they can remove these gases from the natural air. Click here to see the laboratory web site on ozone (NOTE: use your computer's "back" arrow to return to story from lab page). |