California will gain a new invasive species every 60 days. According to the Center for Invasive Species Research at UC Riverside, some of these could lead to economic losses to the state of about $3 billion each year. We'll discuss the issues surrounding invasive species from Scotch broom to Asian carp and beyond.

Guests:

Bryan Walsh , senior writer for TIME Magazine and author of TIME's recent invasive species cover story

Mark Hoddle , director for the Center for Invasive Species and researcher, Department of Entomology at UC Riverside

David Lodge , director of the Environmental Change Initiative at the University of Notre Dame