Here’s a clip from my July 19 appearance with Jordan Fisher-Smith at the Commonwealth Club of California. As part of the Club’s ClimateOne series, we kicked around what it can mean to “preserve nature” in our warming, human-dominated world. Yellowstone National Park (see Jordan’s new book Engineering Eden) is a case in point; Point Reyes National Seashore (as in my recent An Island in Time) is another. Moderator Greg Dalton and a lively audience kept us on our toes. And here’s the whole thing.