At Reason's 40th anniversary event, held in Hollywood on November 14 and 15, "Skeptical Environmentalist" Bjorn Lomborg kicked things off with an engrossing 30-minute presentation about man-made climate change and the best ways to prioritize and solve global problems ranging from water shortages to poverty to malaria. The author most recently of Cool It, Lomborg is also the force behind The Copenhagen Consensus, a path-breaking approach toward effecting efficient solutions to the planet's most pressing issues. "At the end of the day," says Lomborg, "this is...