Last Updated: Monday, July 22, 2013, 19:46
The pesticide that killed 23 schoolchildren last week is a nerve poison banned by many countries because of what the World Health Organisation (WHO) describes as its "high acute toxicity".
Last Updated: Tuesday, December 27, 2011, 21:37
A cancer-causing toxin was found in milk produced by a leading company.
Last Updated: Sunday, March 13, 2011, 09:41
High levels of domoic acid were found in sardines, which may have distressed them off LA coast.
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