"Ozone Hole" Shows That We Avoided Planetary Disaster Before: The PBS documentary chronicles our response to the other climate catastrophe.

With Limited Funds, Is It Better to Buy Solar or an EV?: The answer depends on where you live and what you drive.

Slideshow: Art in the Animal Kingdom: “Animal: Exploring the Zoological World” finds aesthetics in the science.

New Podcast: The Overstory: In Episode 5 of The Overstory we talk with author-activist Paul Hawken about his new book, "Drawdown," and why he thinks that global warming may be a blessing instead of a curse. And we travel to Acadia National Park in Maine, where National Park Service biologists are experimenting with what's called "assisted migration" to help tree species cope with climate change. Also: sustainable living tips from our advice columnist, Mr. Green, and a moving radio diary from a North Carolina woman demanding clean water for her town.

The Latest Issue of Sierra Magazine: Check out the new March/April issue.