02:43
Career Focused on the Environment, A
Former Sierra Club president David Brower talks about the origins of his interest in the environment. He also discusses his belief that, while humans are the first species to learn how to destroy the environment, we are also capable of fixing at lea...
02:28
Trees and Other Critical Resources
Former Sierra Club president David Brower talks about the value of critical resources, including trees, soil, water and rapidly disappearing species.