It’s what arborists do for work — scaling trees and scrambling narrow branches to prune, clear, thin, remove and occasionally to rescue. And a few times a year, climbing is also what some of them do ...

SEATTLE CITY Arborist Nolan Rundquist has been in charge of Seattle’s street trees for 15 years. He started out pruning trees in Lincoln, Neb., and still has the Midwesterner’s love for spreading ...

Brian Holers is in the business of saving trees. He's a local arborist at Root Cause working to save hundreds of Seattle's trees from development. Holers uses what's called flexible porous pavement.