Mark Mills, economics21.org, Senior Fellow at the Manhattan Institute: Building one wind turbine requires 900 tons of steel, 2,500 tons of concrete and 45 tons of nonrecyclable plastic. Solar power

Bruno Comby, President of Environmentalists for Nuclear: He is an author on 11 books on nuclear energy, the environment, and healthy living. For over 30 years, he has been an observer of education

Robinson Meyer staff writer for The Atlantic: Climate change requires us to alter the biogeochemical organism that we call the global economy on the fly, in our lifetimes. Such a task should command