Thousands of people perished in 1984 when a pesticide plant in Bhopal, India, leaked methyl isocyanate gas. The legacy of that industrial accident—the world’s worst—continues to haunt Dow Chemical , which bought the plant’s majority owner, Union Carbide, in 2001. On Nov. 15, the appropriateness of Dow’s sponsorship of the 2012 Olympic Games in London was questioned at a U.K. parliamentary hearing. Dow is a global partner of the International Olympic Committee and has funded an $11 million fabric wrap that will surround the Olympic Stadium next summer. Members of Parliament on the Culture, Media & Sport Committee expressed concern about Dow’s environmental, ethical, and social ideals. But Sebastian Coe, an Olympic gold medal winner, former member of Parliament, and chair of the London Organising Committee of the Olympic & Paraolympic Games, defended the sponsorship. “We are satisfied that Dow were not the owners, the operators, or were involved with that plant at ...