A recent ASU News article on the role of trees and lawns in urban heat island featured CAP scientists Ben Ruddell, Ariane Middel, and Nancy Selover. Shade provided by trees has been long acknowledged as providing some relief from high daytime temperatures in the Valley of the Sun. The team of ASU scientists has worked to quantify the effects of different types of shade on urban microclimates and how much shade is needed to reduce daytime temperatures. This is very useful information for homeowners, designers, architects and others wanting to know just how much shade they need.