Former United Nations Secretary General Boutros Boutros Ghali took your questions on water in our phone-in programme Talking Point.
In 1985 Dr Boutros Ghali famously said that "the next war in the Middle East will be fought over water, not politics".
He has since said that conflicts over water in key hotspots throughout the Middle East can be resolved through the creation of a dedicated international monitoring organisation.
But he has also warned that future population growth will continue to put further strain on water supplies, creating the potential for further disputes.
What does Dr Boutros Ghali see as the solution to providing clean accessible water for all? Does the potential for conflict over water still exist? If so, how does he see these disputes being resolved?