Olympian: The natural features that make Washington uniquely beautiful also make the state especially vulnerable to climate change. Take the mighty Cascade mountains. They are home to glaciers and snowpack that feed many of the state’s rivers, which, in turn, supply water to central Puget Sound cities, nourish Eastern Washington crops, sustain salmon runs and spin the turbines at hyrdroelectric dams that generate clean, inexpensive power — the backbone of the region’s economy. But an …