Photographs of forests in the western U.S. from the mid-1800s show a starkly different reality compared to today, says Paul Hessburg, an ecologist at the University of Washington. …Today, many of these forests are overgrown and dominated by younger trees. Back then, they were typically more open — “park-like”. …Fire played an integral role — perhaps the integral role — in shaping these ecosystems. …Hessburg and others see the rejection of active management in part as a response to the “legacy” of commercial, industrial-scale logging of natural forests. Those rampant harvests often took the oldest and largest trees in the U.S., before a mix of science, policy and advocacy for species like the northern spotted owl caused a shift away from the practice in the 1990s. …“We created a climate that’s hostile to people and health and forests,” he says. What’s critical now is finding ways to adjust, for both ourselves and our forests.