Algae in the area south of the factory farm Valle de Odieta, S.C.L./Corraliza el Tomillar, S.Coop./Hibridación Termosolar Navarra, S.L. The dairy factory farm located in the province of Navarre, Spain, is the biggest in the region. The image was taken in the Southern area of the factory farm. From above, it can be seen how it was established on what used to be a hill. The image shows the green algae growing on the water effluents from the farm, probably due to the high nutrient content of the manure being disposed. This nutrient pollution is likely to reach the Aragón River.