As a result, despite significant progress in reducing agricultural use of potable water (by more than 50% within a decade), consumption of potable water will increasingly exceed renewable resources (Figure 4.2). The main government response has been to reduce demand by promoting drip irrigation and the reuse of treated domestic wastewater (effluent) in agriculture, and to increase potable water supply for the urban sector mainly through the construction of large-scale desalination facilities (Box 4.1). Efforts are also being made to foster the role of economic instruments: significant increases in water tariffs have taken place or are planned in all sectors. Agricultural water quotas have been made more stringent.