This document summarizes a webinar on science and sustainability that took place on September 13, 2011. The webinar featured two guest experts, Prof. Dr. Paul Burger from the University of Basel and Dr. Christine Schmitt from the University of Freiburg. They discussed the definition of sustainability, the ecological, economic and social facets of sustainability, examples of biodiversity conservation and sustainable development projects in Ethiopia, Germany, Basel and Freiburg. The webinar concluded with a discussion of future sustainability projects and questions from the audience.