# Mario Molina

> Mexican chemical engineer (1943–2020)

**Wikidata**: [Q19045](https://www.wikidata.org/wiki/Q19045)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mario_Molina)  
**Source**: https://4ort.xyz/entity/mario-molina

## Summary
Mario Molina was a Mexican chemical engineer who won the Nobel Prize in Chemistry for his groundbreaking work on ozone depletion. He was a pioneering environmental scientist whose research fundamentally changed our understanding of atmospheric chemistry and led to global policies protecting the Earth's ozone layer.

## Biography
- Born: March 19, 1943
- Nationality: Mexico and United States (dual citizenship)
- Education: National Autonomous University of Mexico (undergraduate), University of California, Berkeley (advanced degrees), University of Freiburg (postdoctoral research)
- Known for: Discovering the threat of chlorofluorocarbons (CFCs) to the ozone layer
- Employer(s): National Autonomous University of Mexico, University of California, Berkeley, University of California, San Diego, Massachusetts Institute of Technology, Jet Propulsion Laboratory
- Field(s): Chemistry, Physical Chemistry, Chemical Engineering

## Contributions
Mario Molina's most significant contribution was his collaborative research with Sherwood Rowland in the 1970s that revealed how chlorofluorocarbons (CFCs) released into the atmosphere were destroying the ozone layer. His work demonstrated that CFCs, widely used in refrigeration and aerosols, were being broken down by ultraviolet radiation in the stratosphere, releasing chlorine atoms that catalytically destroyed ozone molecules. This research led directly to the Montreal Protocol in 1987, the international treaty that phased out CFC production worldwide. Throughout his career, he continued researching atmospheric chemistry, air pollution, and climate change, publishing numerous papers on tropospheric chemistry and the environmental impacts of pollutants in urban areas.

## FAQs
### What was Mario Molina's most important scientific discovery?
Mario Molina discovered that chlorofluorocarbons (CFCs) were causing the depletion of the Earth's ozone layer. Working with Sherwood Rowland in the 1970s, he showed how CFCs released into the atmosphere broke down in the stratosphere, releasing chlorine atoms that destroyed ozone molecules, creating what became known as the "ozone hole."

### Where did Mario Molina work throughout his career?
Mario Molina held positions at multiple prestigious institutions including the National Autonomous University of Mexico, University of California, Berkeley, University of California, San Diego, Massachusetts Institute of Technology, and the Jet Propulsion Laboratory. He spent significant portions of his career at various University of California campuses and research institutions.

### What awards did Mario Molina receive for his work?
Mario Molina received numerous prestigious awards including the Nobel Prize in Chemistry (shared with Sherwood Rowland and Paul Crutzen), the Presidential Medal of Freedom, the Tyler Prize for Environmental Achievement, the Volvo Environment Prize, the Willard Gibbs Award, and the NASA Exceptional Scientific Achievement Medal, among many others.

### What was Mario Molina's educational background?
Mario Molina earned his undergraduate degree from the National Autonomous University of Mexico, followed by advanced degrees from the University of California, Berkeley. He conducted postdoctoral research at the University of Freiburg in Germany, establishing his foundation in physical chemistry and atmospheric research.

### How did Mario Molina's work impact global environmental policy?
Mario Molina's research on ozone depletion directly led to the Montreal Protocol in 1987, an international treaty that phased out the production of CFCs worldwide. This represents one of the most successful examples of global environmental cooperation, preventing further damage to the ozone layer and demonstrating how scientific research can drive effective policy change.

## Why They Matter
Mario Molina's work fundamentally transformed our understanding of atmospheric chemistry and demonstrated how human activities could have global environmental consequences. His research on ozone depletion not only revealed a critical threat to planetary health but also showed how scientific evidence could successfully drive international policy action. Without his work, the ozone layer would likely have continued to deteriorate, exposing Earth's surface to dangerous levels of UV radiation that cause skin cancer, cataracts, and ecosystem damage. His legacy extends beyond ozone research to include significant contributions to understanding air pollution, climate change, and the intersection of science and public policy. Molina exemplified how scientists can serve as advocates for evidence-based environmental protection, inspiring generations of researchers to pursue careers in atmospheric chemistry and environmental science.

## Notable For
• Winning the Nobel Prize in Chemistry in 1995 for his work on ozone depletion
• Being the first Mexican-born scientist to win the Nobel Prize in Chemistry
• Co-discovering the mechanism by which CFCs destroy the ozone layer
• Contributing to the development of the Montreal Protocol international treaty
• Receiving the Presidential Medal of Freedom, the highest civilian honor in the United States
• Being elected to multiple prestigious academies including the National Academy of Sciences
• Leading research on air pollution and climate change throughout his career
• Bridging the gap between scientific research and environmental policy
• Mentoring numerous students and researchers in atmospheric chemistry
• Establishing research programs focused on environmental science in Mexico and the United States

## Body
### Early Life and Education
Mario José Molina Henríquez was born on March 19, 1943, in Mexico City, Mexico. He pursued his undergraduate education at the National Autonomous University of Mexico (UNAM), one of the country's most prestigious institutions. After completing his bachelor's degree in chemical engineering, he moved to the United States to continue his academic journey. He earned his Ph.D. in physical chemistry from the University of California, Berkeley, where he developed the foundational knowledge that would later lead to his groundbreaking atmospheric research.

### Postdoctoral Research and Early Career
Following his doctoral studies, Molina conducted postdoctoral research at the University of Freiburg in Germany, expanding his expertise in physical chemistry. This period of international research experience proved crucial for his later work, as it exposed him to different scientific approaches and methodologies. Upon returning to the United States, he began collaborating with Sherwood Rowland at the University of California, Irvine, where their historic research on ozone depletion would begin.

### Ozone Depletion Research
In the early 1970s, Molina and Rowland began investigating the fate of chlorofluorocarbons (CFCs) in the atmosphere. Their research revealed that these seemingly inert compounds, widely used in refrigeration, air conditioning, and aerosol propellants, were actually being transported to the stratosphere where ultraviolet radiation broke them apart, releasing chlorine atoms. These chlorine atoms then participated in catalytic cycles that destroyed ozone molecules thousands of times before being removed from the stratosphere. Their 1974 paper in Nature, "Stratospheric sink for chlorofluoromethanes: chlorine atom-catalysed destruction of ozone," laid out this mechanism and predicted the eventual depletion of the ozone layer.

### Scientific Impact and Recognition
Initially, Molina's research faced skepticism from both the scientific community and industry groups that manufactured CFCs. However, as additional research confirmed their predictions and the Antarctic ozone hole was discovered in the 1980s, the validity of their work became undeniable. The scientific consensus that emerged from Molina's research directly led to the Vienna Convention for the Protection of the Ozone Layer in 1985 and the Montreal Protocol in 1987, which phased out CFC production globally.

### Academic Positions and Research Expansion
Throughout his career, Molina held positions at several prestigious institutions. He worked at the Jet Propulsion Laboratory, where he continued atmospheric research using advanced measurement techniques. He also held professorships at the Massachusetts Institute of Technology and the University of California, San Diego, where he expanded his research interests to include urban air pollution and climate change. His work extended beyond ozone research to encompass broader atmospheric chemistry questions, including the formation of smog and the environmental impacts of various pollutants.

### Awards and Honors
Molina's contributions to science were recognized with numerous prestigious awards. In 1995, he shared the Nobel Prize in Chemistry with Sherwood Rowland and Paul Crutzen for their work on atmospheric chemistry, particularly concerning the formation and decomposition of ozone. He received the Presidential Medal of Freedom in 1999, the highest civilian honor in the United States. Additional honors included the Tyler Prize for Environmental Achievement, the Volvo Environment Prize, and election to the National Academy of Sciences, the American Academy of Arts and Sciences, and other prestigious scientific organizations.

### Later Career and Environmental Advocacy
In his later career, Molina continued to work on atmospheric chemistry and environmental issues, with particular attention to air quality in Mexico City and other urban areas. He established research programs that addressed both ozone depletion and climate change, recognizing the interconnected nature of atmospheric environmental problems. He also became increasingly involved in science policy, advocating for evidence-based environmental regulations and international cooperation on global environmental challenges.

### International Recognition and Legacy
Molina received honorary doctorates from numerous universities worldwide, including the Pontifical Catholic University of Peru, the University of Madrid Complutense, and the University of Miami. He was elected to scientific academies around the world, including the Mexican Academy of Sciences, the Pontifical Academy of Sciences, and the American Association for the Advancement of Science. His work inspired countless researchers and established the foundation for modern atmospheric chemistry research.

### Personal Life and Death
Mario Molina maintained dual citizenship between Mexico and the United States throughout his life, remaining committed to advancing scientific research in both countries. He died on October 7, 2020, leaving behind a legacy as one of the most influential environmental scientists of the 20th and early 21st centuries. His work continues to influence atmospheric chemistry research and environmental policy, with the recovery of the ozone layer serving as a testament to the power of scientific research to drive positive environmental change.

## References

1. Integrated Authority File
2. Virtual International Authority File
3. [Source](https://news.mit.edu/2003/mexico-0402)
4. [Source](https://www.nytimes.com/2020/10/13/science/mario-molina-dead.html)
5. datos.bne.es
6. Czech National Authority Database
7. [Source](https://crsreports.congress.gov/product/pdf/R/R47639)
8. [The Nobel Prize in Chemistry 1995. nobelprize.org](https://www.nobelprize.org/prizes/chemistry/1995/summary/)
9. [Table showing prize amounts. Nobel Foundation. 2019](https://www.nobelprize.org/uploads/2019/04/prize-amounts-2020.pdf)
10. [Source](https://chicagoacs.org/Willard_Gibbs_Award)
11. [Source](https://tylerprize.org/laureates/past-laureates/)
12. [Source](https://www.environment-prize.com/laureates/)
13. [Source](https://www.heinzawards.org/pages/mario-molina)
14. [Source](https://commencement.miami.edu/about-us/archives/honorary-degree-recipients/index.html)
15. [Source](https://www.rsc.org/membership-and-community/connect-with-others/through-interests/interest-groups/gas-kinetics/awards/)
16. [Source](https://www.carnegie.org/awards/great-immigrants/2009-great-immigrants/)
17. International Standard Name Identifier
18. CiNii Research
19. NNDB
20. [Muere Mario Molina, ganador del Premio Nobel 1995](https://www.eluniversal.com.mx/ciencia-y-salud/muere-mario-molina-ganador-del-premio-nobel-1995)
21. SNAC
22. Encyclopædia Britannica Online
23. Brockhaus Enzyklopädie
24. Munzinger Personen
25. [2020](https://centromariomolina.org/wp-content/uploads/2020/10/Comunicado-de-prensa-CMM-7oct-2020.pdf)
26. Freebase Data Dumps. 2013
27. Davos 2015 Participant List