All big oil companies have their share of environmental record blemishes, but examining the way Royal Dutch Shell has dealt with its problems may lead the industry to a greener future, according to a new book. In "Riding The Dragon: Royal Dutch Shell and the Fossil Fire," Jack Doyle chronicles a sampling of 300 incidents of fires, leaks and explosions throughout the petroleum infrastructure of the world's second-largest oil firm, including in the United States, Nigeria and South Africa.