I-Biodegradable ibhekisela emkhiqizweni noma entweni ehlukana ibe izakhi zemvelo, i-carbon dioxide, kanye nomhwamuko wamanzi yizinto eziphilayo ezifana namagciwane kanye nesikhunta, ezingenabungozi emvelweni.
Ngokuvamile, imikhiqizo etholakala ezitshalweni, izilwane, noma amaminerali emvelo ayabola.