National Geographic : 2010 Apr
Grass is not an option in Salton City, which survives on water pumped in from the Colorado River. With 20 mil- lion more residents expected in Cali- fornia by 2050, the quest for water is never over. Preceding pages: As developments such as Discovery Bay increase in the Sacramento- San Joaquin Delta, so does the flood hazard. More than a million people now live behind delta levees.