Every year the World Economic Forum identifies up to 300 exceptional people from the the spheres of business, politics, academia and culture as Young Global Leaders. In a five-part series, Global 3000 interviews eleven of these innovative leaders working in fields ranging from climate change to poverty, energy issues, the world food crisis, and management theory. Joseph Sigelman is the CEO of PetroTiger, a company that provides services to the petroleum industry. PetroTiger’s mission is making sure that the oil fields continue to flow, but Sigelman is also a staunch advocate of atomic energy. Enric Sala is a marine ecologist and heads a project for global marine protection at National Geographic. Sala believes that renewable solar, wind and tidal energy will be key to solving the global energy crisis.