...[P]lans for the open pit mine proposed by...Vista Gold Corporation are sparking opposition from environmentalists and residents. Critics contend that metals and chemicals used in the mining process could contaminate precious groundwater supplies… and threaten public health…Ariel Ruiz, spokesman for a local citizens' movement gaining steam in Todos Santos and nearby communities, said… "People are opposed because it is a high price they might have to pay for this investment…"... Vista Gold President Fred Earnest and project manager Carlos Calderon both dispute environmentalists' contentions that Paredones Amarillos would cause ecological harm."… [also refers to New Gold Incorporated, Blackfire Exploration]