U.N. report : Polluted water kills about 2.2 million a year ; wars claim fewer victims per year . Report also says wastewater could become valued resource if treated . The report defines wastewater as a combination of fertilizer runoff , sewage disposal and other animal , agricultural and industrial wastes . Comment:
U.N. report : Polluted water kills about 2.2 million a year ; wars claim fewer victims per year . Report also says wastewater could become valued resource if treated . Comment: