World Changing Ideas (Scientific American)

From an artificial alternative to DNA, oil that cleans water, pacemakers powered by our blood, the ultimate sustainability index, mining the mobile phone data (last two related to research areas at HP Labs) and more.  Worth browsing: http://www.scientificamerican.com/article.cfm?id=world-changing-ideas-2012-innovations-radical-enough-alter-lives&WT.mc_id=SA_CAT_BS_20121116