Trading In a Suit and Tie for Fleece: A conversation with Avi Garbow, former EPA general counsel.

Trout Country: Fly Fishing on a Changing Yellowstone: A trip down the Yellowstone River to Paradise Valley.

The Intricate Webs That Keep Us Alive: A CT scan of a pigeon reveals the phenomenal complexity within. Check out the photo!

New Podcast: The Overstory: In Episode 6 of The Overstory takes a trip to Miami's "Little Haiti" neighborhood, whichis grappling with "climate gentrification" as rising sea levels and sunny day flooding make the city's high elevation districts attractive to developers. Mr. Green, our advice columnist, talks about the environmental impacts of dogs. And we hear from a cancer survivor who is battling plastic pollution in Great Britain by paddling all of England's rivers.

The Latest Issue of Sierra Magazine: Check out the new May/June issue.