Environment & Climate Change

Author Timothy Egan argues in The Big Burn that the forest fire of 1910 — the largest in American history — actually saved the forests, even as its flames charred the trees. It helped rally public support, Egan explains, behind Theodore Roosevelt's push to protect national lands.

An estimated one in 10 Americans have been exposed to drinking water that contains dangerous chemicals, parasites, bacteria or viruses, or fails to meet federal health standards. Part of the problem, says journalist Charles Duhigg, is that water-pollution laws are not being enforced.

Colin Beavan, the protagonist of the documentary No Impact Man, spends a year living "eco-effectively" — eating only locally grown foods and, eventually, forgoing electricity and toilet paper. Critic David Edelstein calls the film a "21st-century climate-change comedy of manners."

Director Louie Psihoyos talks about his new documentary film The Cove, an expose of dolphin abuse in Japan. Former Flipper trainer Ric O'Barry joins the conversation.

Journalist Charles Siebert and wildlife biologist Dr. Toni Frohoff explain the uncharacteristically friendly behavior of gray whales off the coast of California.

Alastair Fothergill and Mark Linfield are the directors behind the hit nature documentary series Planet Earth. Their new movie, Earth, uses some of the same footage but is "character-based" rather than "habitat based."

Pulitzer Prize-winning journalist Hedrick Smith details widespread pollution of America's waterways in the PBS Frontline documentary Poisoned Waters.

Intent on documenting the effects of climate change, nature photographer James Balog ventured into ice-bound regions with 26 time-lapse cameras, which he programmed to shoot a frame every daylight hour for three years.

Transportation expert Daniel Sperling estimates that the world's car population — which currently stands at 1 billion vehicles — is likely to double in the next 20 years. Sperling is the co-author (with Deborah Gordon) of Two Billion Cars: Driving Toward Sustainability.

Beliefnet.com founder and Editor-in-Chief Steven Waldman discusses the role of religion and the state of the religious right in post-election politics. Will the coalition of religious groups that united in support of Barack Obama fracture over specific issues?

Thomas Friedman is a man bent on revolution. In his new book, Hot, Flat, and Crowded, the three-time Pulitzer Prize-winning journalist writes about the need for a green revolution — and calls upon Americans to lead the charge.

Al Gore made waves for his work raising awareness on climate-change issues. Another poisonous environment has captured his attention as well: a climate that threatens reasonable public discourse.

Tim Fitzgerald, a marine scientist with the Oceans Program at the Environmental Defense Fund (EDF), shares tips for selecting fish that are good for you — and for the environment. The EDF's "Seafood Selector To-Go" is available online and in a pocket-size guide.

With both the cost of and demand for oil rising, nations with large energy reserves are redrawing political and military alliances, and oil-rich countries like Russia and Venezuela are enjoying greater influence. Michael Klare, author of Rising Power, Shrinking Planet, calls it the "new international energy order."

That guilty feeling after a big meal? It might be about more than calories and cholesterol. New Yorker science writer Michael Specter explains how carbon emissions released during food production are having an impact on the environment.

James Hansen, a leading NASA climate scientist, says the Bush administration has tried to silence his warnings about global warming. Writer and scientist Mark Bowen wrote a book on the affair: Censoring Science: Inside the Political Attack on Dr. James Hansen and the Truth of Global Warming.

Primatologist duo Dorothy Cheney and Robert Seyfarth discuss their new book, Baboon Metaphysics: The Evolution of a Social Mind. The husband-and-wife team spent years studying a group of baboons in Botswana, observing their behavior, vocalizations — and even their feces — to better understand the primates' complex social structure.

David Wilcove, one of world's leading experts on endangered species, discusses his new book, No Way Home, which chronicles the decline of the world's animal migrations. Wilcove is professor of ecology, evolutionary biology and public affairs at Princeton University.

A MacArthur Fellow and co-founder of the Pacific Institute, Peter Gleick runs one of the nation's leading water-conservation assessment centers.

The institute's biennial report, The World's Water, surveys global water trends and issues, including the links between water and terrorism and the growing risk of flood and drought.

Investigative reporter Mark Schapiro explains in a new book that toxic chemicals exist in many of the products we handle every day — agents that can cause cancer, genetic damage and birth defects, lacing everything from our gadgets to our toys to our beauty products.