Stephen O. Andersen Stephen O. Andersen Stephen Oliver Andersen (born 17 January 1948) is the American Director of Research at the Institute for Governance and Sustainable Development (IGSD) and is also Senior Expert Member of the Montreal Protocol Technology and Economic Assessment Panel (TEAP) and former TEAP Co-Chair (1989 - 2012). He is considered one of the founders and leading figures in the success of the Montreal Protocol on Substances that Deplete the Stratospheric Ozone Layer. Andersen was born in Logan, Utah, United States, the child of a professor of horticulture and a botanist. He studied business administration for two years at Utah
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