After more than 30 years of relentless advocacy, Ann Weeks, the founding attorney of the Clean Air Task Force (CATF), has retired, leaving behind a powerful legacy in environmental law and public health protection. Weeks played a critical role in enforcing the Clean Air Act, particularly in targeting emissions from power plants, helping to drive significant reductions in air pollution across the United States.
Weeks’ legal expertise was instrumental in securing the Mercury Air Toxics Standards (MATS), a regulation that dramatically reduced mercury and other toxic emissions from coal-fired power plants by over 90%. This rule not only forced the cleanup or closure of numerous polluting plants but also contributed to saving tens of thousands of lives while cutting carbon pollution from the power sector. Her legal strategies advanced the enforcement of modern pollution standards that protect both public health and the climate.
Over her career at CATF, founded in 1996, Weeks applied her deep knowledge of scientific and economic evidence to shape and defend pivotal environmental regulations. Colleagues highlight her ability as a writer and advocate to untangle complex technical data, making it accessible and persuasive in courts. She also served as a mentor and trainer, nurturing a new generation of legal professionals dedicated to environmental causes.
Under Weeks' guidance, CATF became known for leveraging U.S. legal frameworks to promote carbon-free technologies and defend crucial regulations against legal challenges. Her leadership ensured the organization remained at the forefront of efforts to hold industries accountable and push for cleaner energy policies.
Peers praise her for combining tenacity and integrity with strategic legal innovation. Beyond her courtroom victories, Weeks inspired a community of environmental advocates to pursue science-based, legally grounded approaches to combating climate change and reducing pollution.

