Leaves collected one year after the Fukushima nuclear disaster from surrounding regions had sufficient radioactive toxins on them to cause butterflies to die earlier and have deformed offspring.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/butterflies-feeding-leaves-fukushima-radiation-dying-earlier-study
[2] http://admin.indiaenvironmentportal.org.in/category/author/subodh-varma
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/japan
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/radiation
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/butterflies
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/radioactive-waste
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nuclear-accidents
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hazardous-waste