Water reuse Purification 2 Sewage disposal 2 Sewerage 2 Urban aquaculture 2 Wastewater 2 Water 2 Water Resources 2 Water-supply 2 Aquaculture 1 Aquaculture (Animals) 1 Aquaculture and Fisheries Economics, (New March 2000) 1 Case studies 1 Education 1 Education and Training 1 Farmers' income 1 Fish culture 1 Fish production 1 Human Health and the Environment 1 Human Wastes and Refuse 1 Income and Poverty 1 Irrigation 1 Municipal water supply 1 Natural Resource Economics, (New March 2000) 1 Public health 1 Saline water conversion 1 Sewage 1 Sewage irrigation 1 Sewage--Purification 1 Soil Water Management (Irrigation and Drainage), (Revised June 2002) 1