Bill McKibben on global warming
Broadcast: Midmorning, 06/21/2010, 10:06 a.m.
Environmental activist Bill McKibben warned of the dangers of global warming 20 years ago. His latest book takes an angrier edge as he urges a change in our lifestyles or risk living in an inhospitable world.
- Bill McKibben: Environmentalist and founder of 350.org, an international climate campaign. His latest book is called "Eaarth." The creative spelling is intentional.