In the US all the GMO&#x27;s go through years of testing by the government. It can take up to ten years to get approved, to me that is a fair compromise as to potential future problems.  From the earliest testing in the early eighties we&#x27;re going on 25+ years of data right now.<p>Neighbors and GMO&#x27;s are a trickier problem.  For seed fields there&#x27;s a set distance to prevent cross pollination.  In practice for a row crop farmer if I have say an organic farmer neighbor I use something different on the 12 rows next to his fence.  There is no law saying that I have to do it but in my experience there are few problems.<p>The company I worked for had a custom spraying business and it was law that we had to give notice to any registered organic farmer if our sprayers were anywhere near them.  If they asked us to change our schedule we&#x27;d do it.