Daily Climate: Bill McKibben is lanky, soft-spoken, scholarly and engaging. He may also be the closest thing the U.S. environmental movement has to a leader. And he’s in show business now. Still soft-spoken, but very, very angry. On a crisp night earlier this month, a mostly-Gen Next crowd filled the University of Vermont’s Allen Chapel to see the dress rehearsal of the coast-to-coast road show that McKibben hopes will ignite a campus movement. “Do the Math” will visit 20 cities starting Nov. 7. It mixes McKibben’s…