Scientists at Jadavpur University have developed a harvester which uses raw fish scales, which can generate biodegradable energy to power next-gen medical devices like a pacemaker.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/indian-scientists-found-way-recycle-fish-scales-and-generate-green-energy
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/financial-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fish
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/scientists
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fisheries-0
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electronics
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science-and-technology