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![portrait of ron cohen](https://news.berkeley.edu/wp-content/uploads/2022/05/rcohen.jpg)
professor of chemistry, earth and planetary science
Areas of expertise: Air quality monitoring, Astronomy/Chemistry/Physics, Pollution
![Tom McKeag](https://news.berkeley.edu/wp-content/uploads/2018/10/mckeag.jpg)
Tom McKeag
Executive director, Berkeley Center for Green Chemistry
Areas of expertise: Astronomy/Chemistry/Physics, Green chemistry
![Alex Filippenko](https://news.berkeley.edu/wp-content/uploads/2018/10/filippenko.jpg)
Professor of astronomy
Areas of expertise: Astronomy, Astronomy/Chemistry/Physics
![Saul Perlmutter](https://news.berkeley.edu/wp-content/uploads/2018/10/perlmutter.jpg)
Professor of physics
Areas of expertise: Astronomy, Astronomy/Chemistry/Physics, Cosmology
![](https://news.berkeley.edu/wp-content/uploads/2018/02/muller.gif)
Professor emeritus of physics
Areas of expertise: Astronomy, Astronomy/Chemistry/Physics, Climate change, Cosmology, Nuclear