An optical coating like no other

For more than a century, optical coatings have been used to better reflect certain wavelengths of light from lenses and other devices or, conversely, to better transmit certain wavelengths through them. For example, the coatings ...

Human waste an asset to economy, environment, study finds

Human waste might be an unpleasant public health burden, but scientists at the University of Illinois see sanitation as a valuable facet of global ecosystems and an overlooked source of nutrients, organic material and water.

Solar-powered sterilization technology

Rice University nanotechnology researchers have unveiled a solar-powered sterilization system that could be a boon for more than 2.5 billion people who lack adequate sanitation. The "solar steam" sterilization system uses ...

Small is good in quest to resolve water crisis

Can Peepoo stop the flying toilet? A small Swedish company believes so. At the World Water Forum in Marseille, it is promoting a cheap, smart fix for the world's billion slumdwellers.

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