Unreasonable Fellows

Ben Christensen

Co-Founder and CEO at Cambium

Ben, Forbes 30 Under 30 lister, a TedX speaker, and an ultramarathoner, has almost a decade of experience in the climate space, with over five of those years leading Cambium where they have won TIME Best invention and FastCo Most Innovative Companies, as well as awards from World Economic Forum, Nature Conservancy and many others for their environmental work.Whether he’s running 150+ miles across the desert or building a company from the ground up, Ben explores what it means to push limits—offering real-world insights on climate, leadership, and navigating challenges. He holds a Master's of Environmental Management from the Yale School of Forestry and Environmental Studies.