Biodiversity valuable in many ways to humans and the planet

Researchers at the U of MN's College of Biological Science say we're on the brink of mass extinction, due to habitat destruction, overhunting, the introduction of nonnative species, and more. Forest Isbell, lead author of a study published in the scientific journal "Nature," joined Dave to explain the ways biodiversity benefits us, and why it's so important for humans and the whole planet.