This may be difficult . If you look up the MSDS for Roundup, written by Monsanto, of course, the stuff looks kinda innocuous.
The scientists Gilles-Eric Sralini, and Andres Carrasco who ran separate studies on Roundup have been hammered by critics. See: & To the Editor: The letter to the editor sent by representatives of Monsanto, Syngenta, and Dow Chemicals (among others) to Chem. Res. Toxicol. regarding our paper (Paganelli et al., published July 23, 2010) and the tone used in their criticism about other research papers studying glyphosate effects should come as no surprise considering the obvious conflicts of interest inherent in this work when the companies selling a product are also solely responsible for testing its safety. - Andres E. Carrasco
Previous references of the toxicity of glyphosate to humans in Wikipedia have also been withdrawn. However, remarks on Monsanto's "false advertising", and "scientific fraud" persist.
Jeffery M. Smith may suffer from his partisanship against GMOs (Good for him), and his lack of a scientific background or expertise.
The struggle hasn't ended however.
There is still Professor Emeritus Don Huber, Purdue University New Study Links Monsantos Roundup To Autism, Parkinsons and Alzheimers
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&Monsantos Roundup Triggers Over 40 Plant Diseases and Endangers Human and Animal Health ======
Studies Prove Monsanto's Roundup Is Killing You
Monsantos Roundup Weedkiller Found to Damage Integrity of Raw, Fermented Foods
Just railing agains Monsanto and Roundup is hopeless. Monsanto has too much money = power. They are slick. All we can do is present those studies that question the safety of Roundup. But is is depressing that when products like GMOs are fraught with danger, the government doesn't even ask Monsanto to do life long feeding trials. What politicians won't do for campaign financing.