Whether it is New York City, Mexico City or Ho Chi Minh City, enabling equitable access to clean drinking water, and adequate drainage and storm run-off must overcome multiple challenges.Burgeoning urban populations need increasing amounts of water, but the changing climate is impacting primary sources. “What we have considered sustainable water management for decades is untenable when we consider continuing pressures on supply and quality,” Dr Anna Robuck warns us. Enrique Iomnitz explains t...