Photo Toilet chemistry has since evolved into non-explosive forms. Formaldehyde was once commonly used in portable toilets as it kills most bacteria and destroys viruses. However, due to its extreme toxicity in high concentrations and interference with the breakdown process in sewage plants, we rarely use it today. Present-day formulations are enzyme-based, and break down waste through organic, biological activity. Ellyw Evans is studying for an MSc in Science Communication
www.isciencemag.co.uk
Picture: flickr.com/photos/russss/
I, Science
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