Tragically and self-destructively, we human beings have so much difficulty recognizing that we are an integral, inseparable part of the natural world and that we have no other choice but to preserve it. Our failure in understanding this fundamental truth is central to our difficulty in seeing the changes, happening before our eyes, that we are making to the global environment and in acting to prevent them. This talk, given by Eric Chivian, MD, Director of the Program on Biodiversity and Human Health, Center for Health and the Global Environment at the Harvard School of Public Health, shall look at why these alterations are so hard to see and how looking at their consequences from a medical perspective can be helpful. The session will take place on Wednesday, May 1 beginning at 7 pm in the Hunnewell Building of the Arnold Arboretum, $5 for Arboretum members, $10 for nonmembers. Sign up on line at www.arboretum.harvard.edu.Â And here he is below with Harrison Ford – perhaps not the photo the Arboretum had in mind for this post, and we doubt anyone will mistake Mr. Ford as an environmental threat, but we just couldn’t resist.