Low-tech cool: Shade trees for subtropical streets

Shade trees are the superstars of urban landscapes. In addition to their intrinsic aesthetic qualities, these low-tech workhorses reduce air and noise pollution, provide habitat for wildlife, increase property values, and offer cool respite for harried urbanites. Strategically planted shade trees decrease energy usage in urban buildings, absorb carbon dioxide, and supply fresh oxygen. It's no coincidence that researchers around the world are working to find the best shade trees for all types of urban environments.

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