What’s behind the rise in Alzheimer’s and Parkinson’s? Lifetime exposure to toxic chemicals in the environment such as fossil fuel pollution, as it turns out. This according to a new report from the Science and Environmental Health Network and Greater Boston Physicians for Social Responsibility. Today, CWR co-host Francesca Rheannon speaks with the report’s lead author, Jill Stein, who heads the Massachusetts Coalition for Healthy Communities. Dr. Stein also ran for governor of the commonwealth in 2002 on the Green-Rainbow ticket, as well as Secretary of State in 2006.