Chris Wilhite, a red-bearded Sierra Club organizer, straps on his mud boots, climbs out of his Dodge Ram and plunges into a leafy gumbo of creek bottom in the Sam Houston National Forest. He tromps beneath ancient water oaks, mossy basswoods and bright redbuds. Spring ferns are unfurling on the ground, and overhead the calls of cardinals, tufted titmice and Carolina wrens... More >>>