UN: Dirty Water Kills More Humans Than War
By 
And by this I assume the report means all wars, not just inter-state wars, considering that the number for the latter is getting so small in historical terms that nearly everything is riskier.
According to the report — titled “Sick Water?” — 90 percent of wastewater discharged daily in developing countries is untreated, contributing to the deaths of some 2.2 million people a year from diarrheal diseases caused by unsafe drinking water and poor hygiene. At least 1.8 million children younger than 5 die every year from water-related diseases, the report says.
But with proper management, the report notes, “wastewater can be an essential resource for supporting livelihoods.”
The report was released yesterday to coincide with World Water Day.
Full report here.