Tank like devices called solar stills use the sun to evaporate dirty or salty water and condense the vapor into safe drinking water. But large, expensive stills can only produce enough water for a small family. Now, researchers have developed a new material that speeds the process of evaporation, enabling a small solar still to provide all the drinking water one family needs. If the technology proves cheap enough, it could provide millions of impoverished people access to clean drinking water.
Today 783 million, or nearly one in 10, people around the world lack such access, according to UNICEF. These people spend a collective 200 million hours a day fetching water from distant sources. And even though technologies exist for purifying contaminated water and desalinating seawater, these typically require expensive infrastructure and lots of energy, putting them beyond the reach of many communities.
Recently, researchers have been working to upgrade solar stills as a cheap, low-tech alternative. The traditional still is little more than a black-bottomed vessel filled with water and topped with clear glass or plastic. The black bottom absorbs sunlight, heating water so that it evaporates and leaves the contaminants behind. The water vapor then condenses on the clear covering and trickles into a collector.
People of varied political beliefs trying to define expansive speech are dangerous: Zuckerberg Facebook CEO Mark Zuckerberg on Thursday defended the social media platform's refusal to take down content it considers newsworthy "even if it goes against our standards." But while he promoted free expression, limitations were place on coverage of his remarks at Georgetown University.
- Visa, Mastercard waver as FBs Libra faces regulatory heat
- Vodafone updated its Rs 399 postpaid plan with more than 100GB additional data for six months
- NASAs new mission is to study the Sun
- China created vast surveillance apparatus at home with facial recognition technology
- Here is how Indus valley people looked
- New streamline drug discovered by Scientists
- Realme plans to sell 22 Lakhs Devices this Festive Season
- Reliance's JioPhone price slashed to Rs.699 as Diwali offer
- It's finally time to kick off the fifth yes, fifth! annual PC Gaming Week at TechRadar
- Microsoft blocks 36 types of file extension in Outlook Web
- iPad (2019) price in India starts at Rs. 29,900 for its Wi-Fi 32GB
- Google experiences Indexing Issues
- Apple's iPhone 11 series & Watch Series 5 now available for pre-booking
- Leading player in the battle of Mobile payments is Google
- 5G version of chip available in India with upcoming line up of Huawei smart phones