Tropical deforestation is a vivid example of human-caused environmental change and has troubling local and global consequences. In this lecture, Dr. Gary Hartshorn, Executive Director of the Organization for Tropical Studies, provides an overview of tropical deforestation and describes the various approaches he and colleagues have taken to restore tropical forests.

Of the many pressing global change issues, none have as far-reaching effects as biodiversity loss. In this eloquent and passionate talk, Dr. Norman Myers explains why biodiversity is a crucial environmental issue and tells of efforts to find solutions to the problem of species extinction. In his talk, Dr. Myers pays specific attention to tropical forests, where biodiversity is greatest but most at risk.