Introduction by Montserrat Bonvehi, Lecturer in Landscape Architecture at Harvard’s Graduate School of Design, and Seth Denizen, Kiley Teaching Fellow in Landscape Architecture at Harvard’s Graduate School of Design Almost 200,000 acres of land in the fertile Mezquital Valley are irrigated with the untreated sewage of Mexico City. Rainwater, urban runoff, industrial effluent, and sewage in Mexico City is sent to the Mezquital Valley through a 60-kilometer pipe. Soils in this valley have been continuously irrigated with urban wastewater since 1901, longer than any other soil in the world. The capacity of these soils to produce conditions in which agriculture […]
