From the dawn of history, as the human population has continuously increased, so have the water and wastewater disposal requirements. The Megacities of the world have great water challenges to solve to be able to offer sanitation and health to its population, and are one of the topics of this issue of Water Front. You can also meet 2004 Stockholm Water Prize laureates, Professors Sven Erik Jørgensen and William J. Mitsch.
