Nanotechnology could be the answer to keeping a good amount of drinking water for parts of the world in drought or where water is scarse. Researchers in India explain how carbon nanotubes could replace conventional materials in water-purification systems. Mumbai, India, explain how new water purification technologies are being investigated but to be viable in the developing world these have to be simple and inexpensive to install, operate, and maintain.
"Water shortages and lack of access to safe drinking water will continue to grow as major global problems. At present, more than one billion people lack access to safe drinking water and 2.4 billion people lack access to proper sanitation, nearly all of them in the developing countries. At present a third of the world's population live in water-stressed countries, and by 2025, this is expected to rise to two-thirds" -ScienceDaily staff