James G. Anderson (IMAGE) Harvard University Caption Anderson earned the 2021 Dreyfus Prize in the Chemical Sciences for his ground-breaking measurements of the free radicals that drive atmospheric chemistry and for his foundational work to form global agreements to protect the vulnerable stratospheric ozone layer Credit Harvard University Usage Restrictions With proper credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.