Scientists have created a new and more efficient version of an innovative device the size of a home washing machine that uses bacteria growing in municipal sewage to make electricity and clean up the sewage at the same time.
World Water Day is observed on March 22 every year. The day to recognize the importance of earth's most precious natural resource was proposed 20 years ago at the United Nations Conference on Environment and Development.
Recent widespread news coverage heralded the success of a United Nations' goal of greatly improving access to safe drinking water around the world.
But while major progress has been made, a new study from the University of North Carolina at Chapel Hill indicates that far greater challenges persist than headline statistics suggested.
Earlier this month (March 6), UNICEF and the World Health Organization issued a report stating that the world had met the U.N.'s Millennium Development Goal target of halving the proportion of people without access to safe drinking water, well in advance of a deadline.
That goal aimed to boost access to improved drinking water sources, such as piped supplies and protected wells, between 1990 and 2015.
However, the new UNC study estimates that 1.8 billion people – 28 percent of the world's population – used unsafe water in 2010.
Rice and wheat take a lot of water to grow and no one eats more than China. That also means no one contributes more to global warming from irrigation than China - a whopping 30 million tons of CO2 per year just from the pumping systems China uses.
Like everywhere, water usage has gone up in China with the surge in population. Groundwater used for crop irrigation in China has grown from 10 billion cubic meters in 1950 to more than 100 billion today. The pumping systems which support this immense irrigation network annually produce 33.1 MtCO2e (33.1 mega tonnes of carbon dioxide equivalent), claims a new study.
The world is wasting water on a truly colossal scale, according to the United Nations. More than 80 per cent of the used water on Earth is neither collected nor treated – the equivalent to the planet leaving the taps full on and the plugs out.
Using techniques from drug discovery, and state-of-the-art advances in mathematics, computational algorithms and supercomputing, researchers have developed a tool for identifying the most efficient porous materials for CO2.
The need for portable water in places far off the grid is a very real one - whether for disaster relief, humanitarian efforts in areas hit by drought, or even just backcountry expeditions for science or pleasure. And while quite a few solutions exist for pumping and filtering dirty groundwater, another possible way to provide clean drinking water is through harvesting and cleaning rainwater, and a prototype for a new device to do exactly that is in the works.
PhysOrg.comAncient civilizations reveal ways to manage fisheries for sustainabilityPhysOrg.comCredit: National Oceanic and Atmospheric Administration/Department of Commerce In the search for sustainability of the ocean's fisheries, solutions can be...
Cities unable to meet service levelsWaste Management WorldThe average coverage of sewerage network and solid waste management indicates the proportion of properties, household and commercial, that have access to these basic civic services.
You've heard of carbon footprints. A recent paper delves into humanity's water footprint, the various components that contribute to it, and the international trade of water that's been incorporated into products.
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