Anthony Barnosky, Principal Investigator and Professor, Department of Integrative Biology, UC Berkeley; Co-author, Tipping Point for Planet Earth: How Close Are We to the Edge?
Elizabeth Hadly, Professor, Department of Biology, Stanford University; Co-authors, Tipping Point for Planet Earth: How Close Are We to the Edge?
Lisa Krieger, Science and Medicine Reporter, San Jose Mercury News—Moderator

Planet Earth is headed for a tipping point.

Midway through this century, there will be more than 9 billion people on the planet. Already we are using most of the arable land that exists and overfishing the oceans. Water, too, is becoming scarce in many places. And the services that humans depend upon—clean drinking water, steady energy supplies, and protection from disease—are under threat.

Barnosky and Hadly believe that the grand challenge of the 21st century is to change the endgame from one that looks like a train wreck to one to a brighter future. They offer their solutions to our most pressing problems.