Doing what nature once did, thinning out trees on the quintera ranch. We move heard in 1969. Reporter when you have a sustainable forest, what does that mean in terms of fires . It means were more fire resilient. Reporter forest fires are natures game plan for managing a forest. A forest fire isnt always bad, as long as its a cool burning fire. You know we do some prescribed burning, and well do more prescribed burning in the future as understory fires. Reporter thats the small fires . Yes. But when we get the big devastating crown fires that weve seen from california all the way through the west into colorado, those are extremely devastating, and were trying to prevent from those big catastrophic fires. Reporter the fires are bigger for several reasons. There are heroic efforts to put them out before they destroy the growing number of houses built in forested areas. But that undercuts natures way of burning off undergrowth, and that is making forests dangerously dense. Jonas feinstein