From http://scienceinsociety.northwestern.edu - Global Warming: A Threat to Biodiversity is a Northwestern University public outreach program to help the general public understand the reality of global warming and its impact on biodiversity. A panel of five experts discuss- in plain English- the scientific and social issues involved in the ecological aspects of global warming. (5 of 7 - Global Warming) Significant effects of climate change on the environment are already being seen, with major changes to come. Dr. Thomas Lovejoy explains the urgency with which policymakers must confront legislative and economic issues related to climate change.