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Scientists use molecular 'sieve' to purify water
Researchers have taken a major step forward in making previously undrinkable water drinkable, therefore tackling one of the biggest challenges faced by the planet -- some 1.2 billion people lack access to clean drinking water (a number which is set to grow as populations increase). By modifying graphene oxide membranes, the international team of researchers has created what is essentially a molecular "sieve". The selectively permeable membrane lets some molecules through while trapping others behind, producing water at various levels of cleanliness suitable for drinking or for industrial applications.
Latest XPRIZE contests focus on water production and women's safety
The XPRIZE nonprofit just announced its latest set of competitions aimed at "sparking breakthrough solutions to two urgent grand challenges." The first is the "water abundance XPRIZE," which focuses on harvesting clean water from the air using renewable resources. Specifically, the challenge asks participants to create a device that extracts a minimum of 2,000 liters of fresh water per day from the atmosphere, using 100 percent renewable energy. To make things even trickier, the cost can only be two cents per liter of water.
Mac Bundle Box 4: A good deal that does good
Starting today (March 1, 2009), Mac Bundle Box 4 is offering 13 Mac applications worth US$333.82 for the discounted price of US$49. Like most deals of this type, Mac Bundle Box doesn't last long; you have until March 12th to get in on the action.So far, the bundled apps include: Relationship Code Collector DrawIt Espionage Cover Stream DEVONnote QuickScale Project Calculator Transcriva Magnet Involer Stuf Blog Assist What do I mean by "so far"? Well, the Mac Bundle Box team wants you help out tomorrow and tweet up #macbundlebox. If that hash code becomes a Twitter trending topic, they'll add more apps to the bundle.By purchasing Mac Bundle Box 4, you're also doing a good deed as 5% of each purchase is going to Charity:Water, a group that drills water wells for the 1.1 billion people on this planet who don't have clean drinking water.Good apps, good price, good deed. It sounds like a heck of a good deal.
