The Call of the Mountain

In 1962, Rachel Carson's book Silent Spring opened America's eyes to the dangers of pesticides and man's place in nature. This episode of the "Before/After" series dives into the genesis of a poetic and powerful text, which inspired modern environmentalist thought.

What happens to the food we digest after it leaves our body? Is it waste that is thrown away or a resource that can be reused? In search of answers, director Rubén Abruña embarks on an investigative and entertaining search through 16 cities on four continents. He follows the trail of feces from the long sewers of Paris to a huge sewage treatment plant in Chicago.

Death threats, court battles, and an iconic endangered species in middle, The Trouble With Wolves takes an up close look at the most heated and controversial wildlife conservation debate of our time. The film aims to find out whether coexistence is really possible by hearing from the people directly involved.

Farming practices in America's heartland, including excess fertilizers and poor soil conservation, have wrought unintended yet severe consequences on the Mississippi River. Fortunately, farmers, scientists, and citizens are pursuing more sustainable land-use practices that meet ambitious food production goals while ensuring the long-term health of precious natural resources.

The human impact on forests is explored through breathtaking vistas and poignant vignettes set in Canada's Pacific Northwest. Those who rely on this precious resource highlight the tensions and dilemmas between commodification and conservation.

Fifteen years after giving up his studies as a botanist, the filmmaker decides to visit his old professor — Julio Betancur — and returns to the tropical forests of Colombia with Julio and his new disciple, the young Cristian Castro. This reunion launches a voyage that immerses us in doubts over science and the way we see the world, as Julio and Cristian look for their beloved plants in remote forests. Through their work, the film shows us the importance of legacies, and the strength of that ancient bond between master and disciple. Their search also prompts a personal reflection on modern man’s obsession with controlling and mapping nature. In the diverse and nearly infinite world of the tropics, what is the point of counting plants forever?

David Attenborough narrates this close up look at these tiny pollinators captured in flight as never before. Acrobats of the air - flying jewels - iridescent partners of countless plants: hummingbirds are amongst the most remarkable creatures on our planet.

A decade after An Inconvenient Truth brought climate change into the heart of popular culture comes the riveting and rousing follow-up that shows just how close we are to a real energy revolution. Vice President Al Gore continues his tireless fight, traveling around the world training an army of climate champions and influencing international climate policy. Cameras follow him behind the scenes—in moments private and public, funny and poignant—as he pursues the empowering notion that while the stakes have never been higher, the perils of climate change can be overcome with human ingenuity and passion.