Jon Alterman talks with Elfatih Eltahir, professor of hydrology and climate at the Massachusetts Institute of Technology, about climate change and rising temperatures across the Middle East. Professor Eltahir explains what 'wet bulb' temperature means, and why governments should plan future cities away from the coast in order to cope with extreme heat. Then, Jon, Will Todman, and McKinley Knoop discuss climate change mitigation efforts in the Middle East.