They may not be the most glamourous of scientific instruments, but tampons could help experts clean up polluted rivers.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/glow-dark-tampons-shed-light-water-pollution-cotton-care-products-used-uv-light-detect-sewage
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-mail-united-kingdom
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution-control
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-kingdom-uk
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage-pollution