Here two important documents about world water situation. As in the past decades we have still a lot to do..... and obviously there are great work's opportunities in the field of wastewater treatment.
LET'S DO SOMETHING WITH TREATMENT WETLANDS SOLUTIONS
In the Two links below I copy the UN document and web page about this worst world situation....
UN report calls for Post 2015 agenda: www.unep.org/
UN Report Calls for Wastewater Focus in Post-2015 Agenda, as 80% of Worlds Wastewater Discharged Untreated
UN .pdf on the central role of wastewater management http://www.unep.org/pdf
SICK WATER ? THE CENTRAL ROLE OF WASTEWATER MANAGEMENT IN SUSTAINABLE DEVELOPMENT