A beleaguered Norway maple in the Star office driveway was brought down this week. How it had survived where it was, surrounded by bluestone pavement, was a testament to these trees’ toughness. In recent years it had begun to shed large branches, which hung up ominously above parked cars. But it also shaded the south side of the building in the summer, providing a screen of green leaves between my office window and the rest of the world.