Precaution Into Law By James Pinkerton 09/13/2003 Editor's Note: This is the first of a two-part series. CANCUN, Mexico -- September 11 will be remembered for many things, of course, but something that happened on 9/11/03 will also be remembered. The world may mourn -- or not -- the attack on the US two years ago, but the world environmental movement has definitely moved on. Here at the World Trade Organization meeting, the assembled multitude, both pro-trade and anti-trade, was confronted by the coincidence that Thursday marked the first day in which the Cartagena Protocol on Biosafety entered into force. Right...