Technology Review: Clean Water For The Developing World: Cotton fabric treated with nano inks produces a water filter that's efficient and needs little power to work...... kills bacteria with electrical fields but uses just 20 percent of the power required by pressure-driven filters ..... At least a billion people have access only to water contaminated by pathogens or pollution. ..... There are two major chemical methods: adding chlorine to the water to kill the bacteria, or adding iron, which causes the bacteria to clump so it's easily removed. ..... Filtration, in contrast, is attractive because it's simple. .... other low-power solutions take too long or are too complex.
Obesity is to America what water is to the Global South. So much of health care costs would evaporate if most Americans lost weight. So many of the diseases in the Global South would go away if everyone had access to clean drinking water.
Some say we already have the knowledge for both and I am not so sure. One of my insights from volunteering for Obama 08 was that Americans don't socialize enough. They don't meet each other in person enough. Their overeating has a direct relationship to their emotional malnutrition.
It is not true we know all we need to know about clean water. Obviously the water cleaning technologies we have are not cheap enough, not simple enough. Obviously. There has to be relentless innovation to reach the masses.