Dr. Todd Sack speaks and writes widely on the topic of environmental sustainability and climate change preparedness in health care practices.  He edits on behalf of twenty-five health professional societies the My Green Doctor program that helps practices to save money by adopting sustainability and to share wise concepts with patients.  This free service is used by thousands of offices each year, in English (www.MyGreenDoctor.org) and Spanish (www.MyGreenDoctor.es).  In 2022, Dr. Sack was a contributor to the new EyeSustain website.

Dr. Sack has authored more than twenty policies on sustainability and climate change that have been adopted by the American Medical Association and other organizations.   He serves on several non-profit Boards including of the My Green Doctor Foundation and Physicians for Social Responsibility.  He has practiced gastroenterology in Jacksonville, Florida for more than 30 years. During the summer, Todd and his wife Barbara work in a small rural hospital in Tanzania.