Mexico City faces tremendous water challenges—overexploitation of groundwater, poor water quality, subsidence, flooding, inadequate wastewater treatment, and health concerns about the reuse of wastewater in agriculture.

Jorge Saenz shows a rarely seen face of Buenos Aires with his images of the Southern Waterfront Ecological Reserve, in which has been dumped the rubble from the demolition of entire blocks of the historic district.

The inhabitants of a neighborhood in Buenos Aires claim that the presence of an electrical substation has caused the deaths of more than a hundred residents and serious illness for as many more.