Saving endangered trees and forests under threat from climate change

The Earth's forests are at risk from climate change, but conservationists have not given up hope. Guest host Anthony Germain discusses efforts to save endangered trees from extinction with Wesley Knapp, chief botanist at the biodiversity conservation NGO Nature Serve; and Alessandro Cescatti, co-author of a recent study published in Nature that looked into how tree resilience to climate change is declining to critical levels.