The name is more poetry than truth: Itaipú translates as “rock that sings”. But it is a loud noise that penetrates the huge walls of the hydroelectric power station, not far from the famous Iguaçu waterfalls in the triangle between Argentina and Paraguay. It is one of the largest in the world. An impressive work of engineering that supplies Paraguay to 75 percent and Brazil to 15 percent.
Yet. Because the reservoir, from which the 20 turbines are driven, threatens to tip over. The pork and chicken fatteners in the area have dumped their sewage into the lake for decades. Now microorganisms that feed on animal protein eat the concrete of the dam and damage the turbines.