The News - Scientists from China and USA have used nanotechnology particles to develop photocatalyst which uses visible light or indoor lighting to kill bacteria instead of ultra violet light.The Good - The proposed solution does not need Ultra Violet light which accounts for only 5% of visible light - especially in scandanavian countries. Another good application of sunlight.
The Bad - The nanoparticles used are still very expensive and so cannot be used in developing countries.
Read more at - http://www.scidev.net/en/new-technologies/news/nanoparticles-and-light-can-purify-water.html
Image: Danilo Rizzuti / FreeDigitalPhotos.net
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