As you know, George is working with the UN World Food Programme. And as much as hunger is still a huge issue in the world, so is access to clean drinking water. In developing countries, more than a billion people lack clean water. Well, here's some encouraging news.
Researchers in the U.S. say they've developed a 'super sand' that could potentially be used to clean contaminated water. Using nanotechnology, the researchers coat grains of sand in a material called graphite oxide to create a 'super sand.'
In lab tests, the 'super sand' was able to remove mercury and a dye molecule from water samples for much longer than regular sand. In fact, they say the 'super sand' has five times the filtering capacity of regular sand and could become a low cost way to purify water around the world.