Rapid urbanisation in developing nations threatens to trigger a water and sanitation crisis in quickly expanding slums, a report has warned.
Charity WaterAid said chronic water shortages in many of the world's slums were being exacerbated by the arrival of millions of people each week.
Populations in developing nations are set to triple over the next 30 years.
The authors called on the international community to take urgent action to tackle the problem.
'Sanitation and water are inte
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