that's just one of the things monitored by claudia kirsten of lab team at the bio mass research center in like say, share my telephone, heavy metal should definitely not be present. we also check there is no mercury or lead or traces of medication or resistant jermel that when all goes well, they're usually killed off during the purification process and the temperatures in the compost. if i opportunity regulations in germany currently forbid the use of human waste in agricultural fertilizers, that's due to hygiene concerns. following her initial analysis, claudia kirsten is optimistic, sickly about plans to focus next on you. urine as a resource, which right now, still has to be disposed of in the sewage system then hm. the equity, perfect, the carmel would actually be the perfect combination. if we were able to bring all the nutrients we excrete together again in the form of agricultural fertilizer that's used to produce more food added. this now has a good smell of soil. that means the composting has gone well. the material has turned back into soil ada. the team is working on improv