Queens continued to make major advances in environmental science. He discovered the origin of dioxin in trash-burning incinerators, developed alternatives to incinerators and the economic benefits to communities of recycling their trash and developed a computer model that tracks the long-range transport of dioxin and other pollutants from their sources through the food chain into the human diet. This model became invaluable to evaluating dioxin contamination of milk on Wisconsin and Vermont dairy farms. The 1980s saw a slight diminution of Commoner's influence as capitalist sway was on the rise and environmental concerns fell by the wayside. With the advent of the 1990s, however, increased interests in the environment returned Commoner and his theories to the forefront. In 1995, he was one of the featured speakers at the Dartmouth College Earth Day Conference, commemorating the 25th anniversary of Earth Day. There he called for the government to include in its "industrial policy" a promotion of organic farming and the improvement of electric motors as a clean energy source. He encouraged the development of a preventive strategy that encourages production without polluting in the first place. The Earth Times (October 21, 1995) cited Commoner as one of the "100 Who Made A Difference" world-wide and called him "the dean of the environmental movement, who has influenced two generations." In May 1997, on the occasion of his 80th birthday and to commemorate his 50 year career in environmental research and activism, a symposium was sponsored by CBNS, entitled "Science and Social Action: Barry Commoner's Contribution to the Environmental Movement." The purpose of this event was to both honor Commoner's career of outspoken activism, even before it was fashionable, and to create a momentum for a strong future environmental movement. In a directory of scientists published in 1984 Barry Commoner listed among his special concerns "alterations in the environment in relation to modern technology" and "the origins and significance of the environmental and energy crises"realities which would not go away just because people for the moment chose to ignore them. Barry Commoner, together with other outstanding figures in the modern environmental movement such as Lewis Mumford, Rene Dubos, F. Fraser Darling, and Paul Ehrlich, is discussed in an informative account by Anne Chisholm, Philosophers of the Earth (1972). He made the cover of Time (February 2, 1970) in conjunction with an in-depth essay on the ecological issues he helped to publicize. Several of Commoner's own books are written for lay people in non-technical language, including Science and Survival (1966), The Closing Circle (1971), and The Politics of Energy (1979) Making Peace with the Planet (1990). Newsweek took note of his presidential campaign in an article titled "Dr. Ecology for President" (April 21, 1980). Edward TellerEdward Teller (Budapeste, 15 de Janeiro de 1908 Stanford (California), 9 de Setembro de 2003) foi um fisico nuclear estadunidense de origem hungara, popularmente conhecido como "O pai da Bomba H".BiografiaEdward Teller nasceu em 15 de Janeiro de 1908, na cidade de Budapeste, na Hungria, no seio de uma familia judaica, tendo recebido o nome de batismo Teller Ede. Estudou em