Is the world running out of clean water?

The Indian city of Chennai has recently seen a serious water crisis. Chennai is not alone, big cities like Sao Paulo and Cape Town have also struggled with similar shortages in the past. The UN estimates one-sixth of the world’s human population lacks access to clean drinking water, and more than two million people die each year from water-borne diseases. According to USAID, the world’s water crisis is not so much an issue of scarcity as it is of poor management and inequitable distribution. So why is it happening and how can the water crisis be solved?