People around the world, except the coldest cities: REDUCE YOUR HEAT READILY, EASILY. All asphalt roads and playgrounds and parkinglots can very simply have a grey-colored powder so that the black absorption rate is reduced dramatically. This could have been done in 1930!--mixed in to turn the surface (or entire asphalt) grey.
According to Chao, asphalt pavement reflects only five to 20 percent of the sun’s energy, depending on its age (asphalt lightens as it ages). In comparison, “cool pavement” could reflect from 30 to 50 percent. http://www.triplepundit.com/2012/09/heat-island-effect/