A federal judge has just ruled that a county ban in Hawaii against the cultivation of GM crops is preempted by federal and state law. Such federal assertion is gaining importance as state and local politicians seek to impose product bans based on incomplete or erroneous safety research. Plant Protection Challenges Dose makes the poison, and bias ruins the research. LeRoy Lowe, president of the Canadian nonprofit organization "Getting to Know Cancer," published research in the journal Carcinogenesis that reasonably asserts many chemicals in lower safe doses individually may conspire when used together into something unsafe. However, he undermines the credibility of his work by trying to evoke emotional reaction with the disingenuous way he...