An engineer of the Toronto-based mining giant Barrick Gold Corp.'s shows the Pueblo Viejo mining area in Los Cacaos, Dominican Republic, Tuesday, July 30, 2007. Barrick Gold Corp.'s decision to proceed with digging one of the Western Hemisphere's largest gold mines depends on the Dominican government helping clean up the pollution it left for miles around the site, the company's chief executive said Tuesday. Barrick plans to invest more than US$2 billion (1.5 billion) in reopening the mine. (AP Photo/Ramon Espinosa)