Montreal Protocol
Stephen Oliver Andersen (born 17 January 1948) is the American Director of Research at the Institute for Governance and Sustainable Development (IGSD) and former co-chair (1989–2012) of the Montreal Protocol Technology and Economic Assessment Panel (TEAP). He is considered one of the founders and leading figures in the success of the Montreal Protocol that has phased out the chemicals that deplete the stratospheric ozone that protects the Earth against the harmful effects of ultraviolet radiation that causes skin cancer, cataracts, and suppression of the human immune system, and destroys agricultural crops and natural ecosystems. Because ozone-depleting chemicals are also powerful greenhouse gases the Montreal Protocol also protected climate.