With people in isolated areas or in catastrophic situations, a team of MIT scientists created a water purification device that runs on very little electric charge, does not require filters, and is portable.
How the fallout of the water crisis in Pakistan's commercial hub Karachi is felt by school going girls.
"The headline message is to reassure drinking water consumers around the world, that based on this assessment, our assessment of the risk is that it is low," Bruce Gordon of the World Health Organization says.
In the poorest countries, about half of facilities do not have basic water services - meaning water delivered by pipes or boreholes that protect it from faeces - putting birthing mothers and newborns in particular danger, new data shows.
A majority of the 193 million population has access only to severely polluted water. Every year over 50,000 children die of diarrhoea.
The politically unstable country's deteriorating economy is threatening water and sanitation plants which are now unable to produce clean drinking water.
Every drop of water counts, even wastewater. World Water Day this year is about the reduction and safe recycling of water that has been contaminated after it has been used in industrial, agricultural or domestic processes.
Landslides in Chile pollute rivers, leave three million in capital Santiago without water
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