22 March 2017, Rome--- FAO today marked World Water Day by highlighting the opportunity that treated wastewater represents for agriculture and improved food security and nutrition. Globally, most wastewater is released into the environment without being treated. As a result, in many regions of the world, contaminated water is discharged into rivers and lakes and ends up in oceans. But treated wastewater can be a cost-effective and sustainable solution to water scarcity. Key to improving wastewater management is raising social acceptance of the use of treated wastewater, and highlighting the benefits will greatly contribute to eliminating any stigma.