It's often said that trees are the only form of city infrastructure that actually increase in value and capacity over time. So why have so many North American cities historically underfunded their care and maintenance? And why do we continue to indiscriminately mow down trees – and entire urban forests?

Out On A Limb answers these questions and more, as it explores the secret lives and extraordinary infrastructure benefits of trees in cities, the critical role urban forests can play in increasing climate resiliency, and how grassroots organizations can empower city leaders to invest in the urban trees and forests we love–and need.