Elizabeth Adam, Jennifer Hefferan and Suzanne Carey       Introduction   Porous paving (also called pervious paving, permeable paving, no-fines paving, and percrete) is a material that helps to decrease the stormwater impacts of paving and thus reduce the environmental costs of development. The material has been used and developed since the 1970s and landscape architects have been instrumental in its development. Porous pavements are beginning to gain acceptance, but deserve to be better known for the many benefits they provide.