"The cancer-research arm of the World Health Organization last week announced that glyphosate, the world’s most widely used herbicide, is probably carcinogenic to humans."1.2. "Glyphosate has been linked to tumours in mice and rats — and there is also what the IARC classifies as ‘mechanistic evidence’, such as DNA damage to human cells from exposure to glyphosate."1,2 "The US Environmental Protection Agency is currently conducting a formal review of the safety of glyphosate (which it does not consider carcinogenic in humans) and said that it would give “full consideration” to the IARC study."1,2 "Glyphosate has been detected in the blood and urine of agricultural workers, indicating absorption."1,2. The Working Group classified glyphosate as “probably carcinogenic to humans” (Group 2A).1,2. "An agency of the World Health Organization has declared that glyphosate, the active ingredient in Roundup, “probably” causes cancer in people."3
1. Daniel Crerssey. Widely used herbicide linked to cancer.. March 24, 2015. Nature News & Comment
2. Kathryn Z. Guyton, Dana Loommis, Yann Grosse, Fathiha El Ghissassi, Lamia benbrahim Tallaa, Neela Guha, Ghiara Scoccianti, Heidi Mattock, Kurt Straif. Carcinogenicity of tetrachlorvinphos, parathion, malathion, diazinon, and glyphosate. The Lancet. Published Online: 20 March 2015
3. Andrew Pollack. Weed Killer, Long Cleared, Is Doubted. The New York Times. March 27, 2015.