The combination of two hydrogen atoms and one of oxygen, H2O, is the elemental key to life on Earth. Yet global issues related to water — whether too much or too little of it, its quality and its accessibility, along with its impact on gender and geopolitics — have never been more critical to our planet and its 7.3 billion inhabitants.
Earlier this year the World Economic Forum declared water crises the greatest international risk. Worldwide, 2.5 billion people don't have access to safe water. Every day nearly 3,900 children die because of dirty water or poor hygiene, according to the World Health Organization.
Read about 10 hot spots across the globe that are being devastated by the most urgent water crises.
—By Bob Woods, special to CNBC.com
Posted 06 October 2015