Profiles John Muir, founder of the Sierra Club.

Presents the story of Douglas Tompkins, founder of The North Face, who sold his stake in the company and used his fortune to protect over twenty-five million acres of land in South America from development.

"Bill McKibben is not a person you'd expect to find handcuffed in the city jail in Washington, D.C. But that's where he spent three days in the summer of 2011, after leading the largest civil disobedience in thirty years to protest the Keystone XL pipeline. A few months later the protesters would see their efforts rewarded when President Obama agreed to put the project on hold. And yet McKibben realized that this small and temporary victory was at...

Often called the mother of the modern environmental movement, Rachel Carson rocked the world in 1962 with her book Silent Spring, which warned the American public of the impact of pesticides on the environment and unleashed an extraordinary national debate about science and safety. At the center of that firestorm stood Ms. Carson, a strong, intensely private woman who balanced her love of the natural world and passion for writing with personal strife....