Hazy, hot and… shady? How street trees counteract air pollution and heat in American cities‎

It's a catchy tune, but The Lovin Spoonful's "Summer in the City" doesn't paint the picture of an appealing environment with its description of a sidewalk as "hotter than a match head." New research from Northeastern University may offer relief from those conditions, however, finding that extreme heat and air pollution don't necessarily go hand in hand when the concrete jungle is made a little more green.