The organophosphate Monocrotophos as cause of the India school lunch deaths

Poisoning through environmental chemicals has been with humans for a long time: from lead poisoning in ancient Rome over workplace exposure to mercury in 19th century Britain to multiple tragedies due to environmental poising in the 20th century.

http://www.innovations-report.com/html/reports/medicine_health/organophosphate_monocrotophos_india_school_lunch_218014.html