New York Times: IN his role as a cheerleader for globalization, Thomas L. Friedman has always been aware that there are environmental consequences. But now, with “Hot, Flat, and Crowded” (Farrar, Straus & Giroux, $27.95), he embraces going green not just as a national security imperative but also as an economic El Dorado. Lacerating the ubiquitous, feel-good, magaziney “205 easy ways to save the earth,” Mr. Friedman, a columnist for The New York Times, exhorts sacrifice to stem rapidly …