(AP) — Conflicts between humans and grizzly bears in the region around Yellowstone National Park dropped last year, but that wasn't enough to reverse a long-term trend of more potentially dangerous interactions as populations of both bruins and people increase. Measures taken in recent years to drive down the trend — such as using bear-proof garbage containers and discouraging the use of bird feeders that attract bears — will have to continue spreading to keep up with the grizzlies' expanding range, he said. The Yellowstone population has slowly rebounded and now hosts the second-largest concentration of grizzly bears in the Lower 48 states.