RE: Invention uses sunlight to produce clean water
Perhaps there really is "nothing new under the sun" as we reported on a similar invention in 2007, though this one simply used existing plastic bottles. You can read about it and see a short video at
http://ec.europa.eu/research/infocentre/article_en.cfm?id=/research/star/index_en.cfm?p=15_main&item=Success%20stories&artid=3678