In what may turn out to be a boon for developing countries, scientists claim to have created a device which can generate electricity from waste water.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/now-device-which-can-generate-power-waste-water
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-line-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/developing-countries
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electricity
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-energy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-treatment
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/netherlands
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rivers
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-recycling