Genetically modified crops do not add to human health risks, study concludes, but study doesn’t find increased yields either.

http://www.stltoday.com/business/local/article_a7ffbe9a-5848-5826-aa28-6b75b3c947d2.html

You’ll find links in this article to the new GMO study by the National Academies of Sciences and claims of conflict of interest by Food and Water Watch. Read and see what you think. Note that the question of the effect of herbicides on GMOs is still open.