Looking up to the trees

Looking up to the trees

Sam Lieb (right) points out the peeling bark of river birch trees outside the Evanston Public Library on Church Street. Lieb, a library assistant with a degree in environmental studies, led a dozen people on a free, guided tree walk around downtown Evanston. They stopped to study and sketch eight trees in the cold. “Knowing about trees is a good way to connect with nature,” he said. “They’re beautiful. They’re everywhere. And they help ground yo…