The ancient Indian tradition of growing tulsi (Ocimum sanctum) in the backyard is not without scientific backing.
Research shows that the tulsi, or Indian basil, mitigates the ill-effects of radiation, whether background or nuclear, and could protect cells in patients undergoing radiation therapy for cancer.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/tulsi-mitigates-radiation-effects
[2] http://admin.indiaenvironmentportal.org.in/category/author/syed-akbar
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/radiation
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cancer
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/herbal-medcine
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health