Some Mexico City residents see future in rain harvesting that could be life changing

MEXICO CITY — Edgar Serralde Galicia lives in a part of Mexico City known for water: Xochimilco, where picturesque canals have irrigated produce grown on man-made islands and served as transportation routes since the days of the Aztecs. But like roughly a million residents of the capital, Serralde isn’t connected to the city’s water system. [...]