For education and discussion only. Not for commercial use.LONDON, Aug. 30 — One of the largest oil companies in the world, Royal Dutch/Shell, has promised to avoid exploring or drilling on sites that carry the United Nation's World Heritage designation. It is the first energy company to make such a promise. Shell's decision comes a week after the International Council on Mining and Metals, a group of the world's 15 largest mining companies, said it would stop exploring or mining on World Heritage sites. Taken together, the commitments are a "big step forward," said Dr. Mechtild Rossler, director of European...