Thomas Patrick Coohill a member of the Review Committee of the United Nations for the Montreal Protocol on Substances that Deplete the Ozone Layer. His speciality is the effects of ultraviolet radiation on cells and viruses. He has published over 100 reviewed articles, book chapters, and books. He is a sought after consultant to industry and governments and has been a featured speaker in over 40 countries. Coohill is the recipient of several awards, including a Sigma Xi National Lectureship (twice), The Order of St. Michael (humanitarian), the meritorious RA Award from the American Society for Photobiology, and Outstanding Teacher and Researcher. He
Ozone depletion to increase dramatically as a result of thinning ozone, as well as harming plants and animals. These concerns led to the adoption of the Montreal Protocol in 1987, which bans the production of CFCs, halons and other ozone-depleting chemicals. The ban came into effect in 1989. Ozone levels stabilized by the mid-1990s and began to recover in the 2000s. Recovery is projected to continue over the next century, and the ozone hole is expected to reach pre-1980 levels by around 2075. The Montreal Protocol is considered the most successful international environmental agreement to date. Three forms (or allotropes) of oxygen