I wish I could give you advice about your cotton field dilemma. Unfortunately, I don't know enough about the effects of living near a cotton field. But there are numerous articles written about the health benefits of consuming pomegranates. Many of these articles even say that eating pomegranates can reduce your chances of getting cancer. If I were in your shoes, and worried about getting cancer. I would buy several pomegranate trees. The benefits of of consuming pomegranates far outweigh the results of not having pomegranates planted in your yard. Plant several varieties. Pomegranates are very good for you.