Human waste fertiliser. Pile of treated sewage sludge in a field. Sewage sludge is a by-product of sewage treatment. If treated it can be used as an agricultural fertilser for food and non-food crops. Although treatment should destroy almost all of the pathogens present in the sludge,there is still some controversy over its use as a fertiliser | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gowland, Ian |
Taille de l’image : | 4864 px × 3648 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |