One of the most troubling forms of global change is the alteration of natural landscapes, which leads to habitat loss, invasive species, and diminished biodiversity. In this talk, Carla D'Antonio from the University of California, Berkeley provides an overview of how human activity is having a profound affect on natural living systems. Dr. D'Antonio argues that while society does pay attention to impacts that affect agriculture or other economic activities, it must become aware of the widespread changes that are degrading natural habitats and reducing biodiversity.