MILFORD, PA — Free environmental films that feature key conservationists who each had a significant impact on natural resources will be offered this summer at Grey Towers National Historic Site, ancestral home of Gifford Pinchot, founder and first chief of the U.S. Forest Service. Each film will include a secondary component, such as a walk or a talk. The films are free.

The first film, on Saturday, June 16, at 7:30 p.m., will be “Green Fire: Aldo Leopold and a Land Ethic for Our Time.” It portrays how conservationist Leopold, who attended Forestry School at Grey Towers in the early 1900s, called for a land ethic that shaped conservation in the 20th century. His vision was to help connect communities to the land. Visitors can come to Grey Towers before the film to hike to a re-created campsite that portrays how Leopold, and other young forestry students, might have lived at Grey Towers. Email greytowers@fs.fed.us or call 570/296-9630.