All sustainable all-purpose cleaners from Marcel's Green Soap are at least 97% biodegradable. We can hear you thinking: why not 100%? We are happy to explain: Biodegradability is the process by which organic compounds, i.e. substances containing carbon and hydrogen, are broken down by the natural ('biological') activity of micro-organisms, among others. Our products also often contain salts. These salts are used for the pH, for dissolving dirt and also to make the products a bit thicker. Salts are not biodegradable, hence the 97%. There. Now that we have clarified that, you may also be happy to know that we only use bottles made from 100% recycled plastic for our all-purpose cleaners. In this way, we contribute to reducing the enormous amount of plastic in circulation. So don't forget to throw the bottle in the plastic waste when you have finished it. The bottle will then automatically end up back in the chain with our bottle manufacturer.