Mary Nichols is a prominent figure in environmental policy, known for her work in air quality and climate change. She served as the chair of the California Air Resources Board from 2007 to 2020, where she played a key role in implementing regulations to reduce greenhouse gas emissions and improve air quality in California. Nichols has a background in law and public policy, having earned her degree from Harvard Law School. Throughout her career, she has held various positions in government and academia, contributing to significant environmental legislation and initiatives aimed at promoting sustainability and public health.