GMO Myths And Truths, An Evidence-Based Examination Of The Claims Made For The Safety And Efficacy Of Genetically Modified Crops, Earth Open Source, June 2012
And a summary:
GMO Myths and Truths, Earth Open Source, June 2012
The authors began by saying "a large and growing body of scientific and other authoritative evidence shows that these claims [e.g. GMOs increase crop yields, reduce pesticide use, are strictly regulated for safety] are not true." They proceeded to cite that evidence. Boy did they. There are literally hundreds of citations in this report.
This video accompanied the summary. It describes the conditions farmers face dealing with GMOs ... having to spray more (at more cost) to defeat weeds (or be told you have to weed mechanically!), having to pay for new seed every season instead of keeping some from a previous crop, being sued if some GMO seed accidentally contaminates your field. How do small farms keep up under the GM/Monsanto pressure?