The sharp seven-fold growth of the population of the Earth in the twentieth century has created one of the gravest global problems of present – the lack of fresh water, the source of all life.

Around the world, 748 million people lack access to a clean drinking water source, while billions more lack drinking water that barely meet safety standards, according to a UN report released in 2015.

The Food and Agriculture Organization (FAO) forecasts that more than 4 billion people will be living under serious water shortages by the mid-2030.

Read more here: Central Asia to experience water crisis in 35 years