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Mario J. Molina

 
Scientist:

Mario José Molina

Mexican physical chemist (1943–)

Molina, the son of a diplomat, studied chemical engineering at the University of Mexico. After further study in Europe at the University of Freiburg and at the Sorbonne, Molina moved to the University of California, Berkeley, where he gained his PhD in 1972. He worked initially as a postdoctoral student at the Irvine campus of the University of California with F. S. Rowland. Following a spell at the Jet Propulsion Laboratory he moved to MIT in 1989 as professor of environmental sciences.

Rowland had become interested in the fate of the chlorofluorocarbons (CFCs) used as the propellant in most aerosol cans, and asked his new colleague if he would be interested in working out what happened to them as they rose into the stratosphere. It would be, Molina later confessed, “a nice, interesting, academic exercise.”

He quickly worked out that as CFCs were stable they would eventually accumulate in the upper atmosphere. There, he argued, they would be broken up by ultraviolet light and chlorine atoms would be released. Rowland suggested that Molina should analyze how free chlorine atoms would behave. Molina suspected that a chain reaction would be produced, reducing the amount of ozone in the upper atmosphere. Despite this, Molina still thought the effect would be negligible. It was only when he discovered that the amount of CFCs released each year was about 1 million tonnes that he realized that much of the ozone layer could be destroyed. Molina published his results in a joint paper with Rowland in 1974. The National Academy of Sciences issued a report in 1976 confirming the work of Molina and Rowland and in 1978 CFCs used in aerosols were banned in the United States. In 1984 Joe Farman detected a 40% ozone loss over Antarctica.

For his work on CFCs and the ozone layer Molina shared the 1995 Nobel Prize for chemistry with Rowland and Paul Crutzen, thus becoming the first Mexican to receive a Nobel Prize for science.

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Mario J. Molina

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Mario Molina

Mario Molina at the Senate of Mexico.
Born March 19, 1943 (1943-03-19) (age 66)
Mexico City, Mexico
Nationality Mexico, U.S.
Fields Chemistry
Institutions UC San Diego, UC Irvine, JPL at Caltech, and MIT
Alma mater National Autonomous University of Mexico, Albert Ludwigs University of Freiburg, University of California, Berkeley
Doctoral advisor George C. Pimentel [1]
Known for Researched the threat of CFCs to the ozone layer in the stratosphere.
Notable awards Tyler Prize for Environmental Achievement (1983), NASA Exceptional Scientific Achievement Medal (1989),[2] Nobel Prize in Chemistry (1995), UN Environment Programme Sasakawa Environment Prize (1999), The 9th Annual Heinz Award in the Environment (2003)[3].

José Mario Molina-Pasquel Henríquez (born March 19, 1943 in Mexico City) is a Mexican chemist and one of the most prominent precursors to the discovering of the Antarctic ozone hole. He was a co-recipient (along with Paul J. Crutzen and F. Sherwood Rowland) of the 1995 Nobel Prize in Chemistry for his role in elucidating the threat to the Earth's ozone layer of chlorofluorocarbon gases (or CFCs), becoming the first Mexican-born citizen to ever receive a Nobel Prize in Chemistry.[4]

Biography

Molina is the son of Roberto Molina Pasquel, a lawyer and diplomat who went on to serve as Mexican Ambassador to Ethiopia, Australia and the Philippines,[1] and Leonor Henríquez de Molina. After completing his basic studies in Mexico City and Switzerland[1] he earned a bachelor's degree in Chemical Engineering at the National Autonomous University of Mexico in 1965, a postgraduate degree from the Albert Ludwigs University of Freiburg, West Germany, in 1967 and a doctoral degree in Chemistry from University of California, Berkeley in 1972.

In 1974, as a postdoctoral researcher at UC Irvine, he and Rowland co-authored a paper in the journal Nature highlighting the threat of CFCs to the ozone layer in the stratosphere.[5] At the time, CFCs were widely used as chemical propellants and refrigerants. Initial indifference from the academic community prompted the pair to hold a press conference at a meeting of the American Chemical Society in Atlantic City in September 1974, in which they called for a complete ban on further releases of CFCs into the atmosphere. Skepticism from scientists and commercial manufacturers persisted, however, and a consensus on the need for action only began to emerge in 1976 with the publication of a review of the science by the National Academy of Sciences. This led to moves towards the worldwide elimination of CFCs from aerosol cans and refrigerators, and it is for this work that Molina later shared the Nobel Prize in Chemistry.

Between 1974 and 2004 he variously held research and teaching posts at UC Irvine, the Jet Propulsion Laboratory at Caltech and the Massachusetts Institute of Technology (MIT), where he held a joint appointment in the Department of Earth Atmospheric and Planetary Sciences and the Department of Chemistry. On July 1, 2004 Molina joined the Department of Chemistry and Biochemistry at University of California, San Diego and the Center for Atmospheric Sciences at the Scripps Institution of Oceanography.

Molina is a member of the Pontifical Academy of Science, the National Academy of Sciences, the Institute of Medicine and The National College of Mexico. He serves on the boards of several environmental organizations and also sits on a number of scientific committees including the U.S. President's Committee of Advisors in Science and Technology, the Institutional Policy Committee, the Committee on Global Security and Sustainability of the John D. and Catherine T. MacArthur Foundation and the Mario Molina Center. He has also received more than 18 honorary degrees and Asteroid 9680 Molina is named in his honor.[6]

Molina divorced Luisa Tan Molina and married his second wife, Guadalupe Álvarez, in February 2006. His only son works as a physician in Boston.[1] Molina had been assigned by U.S. President Barack Obama to form part of the transition team on environmental issues.

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Scientist. A Dictionary of Scientists. Copyright © Market House Books Ltd 1993, 1999, 2003. All rights reserved.  Read more
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