The Paraquat Principle By Duane D. Freese It's rarely wise to throw caution to the wind. But the precautionary principle? As it is currently promoted by some environmental organizations and practiced by some countries, it deserves to be blown away. The problems of the principle received a thorough airing from its critics at a forum sponsored by the Marshall Institute, a Washington-based think tank focusing on science policy. The forum at the National Press Club last week, "Uses and Misuses of Science in Regulating Chemicals: Unintended Consequences for the Developing World," reviewed application of the precautionary principle to new biotechnology...