Jain has also developed a ‘clay coin’, which, he says, can disinfect the water and make it safe for drinking
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/how-about-purifier-made-clay-safe-water
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-line-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water-quality
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diarrhoea
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects