On Wednesday, July 26 at 5:30 pm at the Polly Hill Arboretum, 809 State Road in West Tisbury, Dr. Eric Chivian, founder and former director of the Center for Health and the Global Environment at Harvard Medical School, will present a talk on recognizing and addressing global environmental threats. His lecture will also touch on Lyme and other tick-borne diseases, a topic of great importance to the Island community. In 1980, Dr. Chivian co-founded the International Physicians for the Prevention of Nuclear War, recipient of the 1985 Nobel Peace Prize. During the past 26 years, he has worked to involve physicians in the United States and abroad in efforts to increase public understanding of the potential human health consequences of global environmental change, and in 2008 was named by Time magazine as one of the 100 Most Influential People in the World. Dr. Chivian is the senior editor and author of Sustaining Life: How Human Health Depends on Biodiversity, named “Best Biology Book of 2008” by Library Journal. He currently directs a new nonprofit, the Program for Preserving the Natural World. The lecture is co-sponsored with the Vineyard Conservation Society. $10 / $5 for PHA and VCS members.