Marcalee Alexander, MD is a specialist in Physical Medicine and Rehabilitation. A graduate of Jefferson Medical College, she is a Past-President of the American SCI Association. In 2019, to motivate rehabilitation professionals and persons with disabilities to take action regarding climate change, she began a walk from Canada to Key West to educate people about disasters, disability and climate change and the need for an accessible, health-promoting environment. In 2020, she paused the walk due to Covid19. Concomitantly, she founded the 501C3 Sustain Our Abilities, whose mission is to educate people about climate change, disability and health. Dr. Alexander also is founding Editor-in-Chief of The Journal of Climate Change and Health and is organizing Climate and Health 2023, a hybrid international meeting. Her walk, now named the Graham-Green Route Aiding Health Adaptation will resume 2/24/24 and she has created a Healthy Living Space petition as part of this journey.