Ozone is a substance that touches on our modem society in .puny ways. Ozone is used in industrial
processes and as a disinfectant. Ozone is a strong oxidizing agent that is present in photochemical smog.
Ozone in the stratosphere screens the surface of the earth fiom biologically damaging ultraviolet radiation.
All of these uses emerge fiom our basic understanding of ozone that began with the recognition by
Sch6nbein in 1840 that ozone was a unique substance produced in a variety of processes.