The petitioner, the American Agriculture Movement, a group representing small family farmers, argues that if industry has to get rid of its ozone depleters, the government ought to clean up its act, too. Another concern is alumina, a byproduct of shuttle exhaust, which forms particles that facilitate chemical reactions leading to ozone depletion. Experts say that ammonium perchlorate has an ozone-depleting potential as high as other chemicals scheduled for phaseout by the year 2000.
