Environment News Service: If global warming continues unchecked, by 2100, New York City will feel like Las Vegas does today and San Francisco will have a climate comparable to that of today’s New Orleans. In 2100, Boston will have average temperatures like those in Memphis, Tennessee today. These higher temperatures will be uncomfortable financially as well as physically, according to a report released Thursday by researchers at Tufts University, commissioned by the Natural Resources Defense Council, NRDC. …