49% of USA farms have Glyphosphate (Round UP) resistant weeds as compared to 34% in 2011. Recent data suggests the farming practices that accompany the use of seeds that are genetically modified are a huge reason this is happening as more and more herbicide is having to be used to deal with the weeds. This is accelerating the process of natural selection. To read more, click here – http://news.yahoo.com/us-39-superweeds-39-epidemic-shines-spotlight-gmos-021125425.html