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Scientists confirm: Summer in the concrete jungle is the worst. They call it the Urban Heat Island effect, which stems from the fact that buildings don’t diffuse heat as well as trees do. Manmade structures trap heat, keeping it from being released into the atmosphere through the process of convection. In the most humid cities, such as Atlanta, convection is reduced by nearly 60 percent. Now that’s hot.
MORE: Why Cities Are Hotter in the Summer
