Water use
This Arizona State University photo shows a Phoenix street coated half with a new, lighter-colored pavement at center left while the original blacktop is seen at right on Sept. 10, 2020. A team from Arizona State University is working with the city of Phoenix on a pilot program studying the use of "cool pavement" to reduce the heat island effect, a phenomenon that raises temperatures in urban areas covered by asphalt and concrete. (Arizona State University via AP)
Pavement technology could cool cities from the ground up

By Brian P. D. Hannon Oct. 18, 2020 11:15 AM EDT