The first Earth Day was organized nearly 50 years ago after a massive oil spill in Santa Barbara led lawmakers, companies and scientists to support environmental protections. Now Earth Day is celebrated in more than 120 countries. But is our environment, and are we, any safer from climate threats and human intervention? We’ll discuss the legacy of Earth Day with guests: Adam Rome, Ph.D., environmental historian and professor of history, University of Buffalo Ralph Nader, former presidential