[Natalia]

There are thousands of biogas plants across Europe and I consider it a testament of safety in general. I would suggest checking out the Safety First document by the German Biogas Association to learn about the risks associated with anaerobic digestion and how such risks are mitigated: https://www.biogas.org/edcom/webfvb.nsf/id/en-safety-first-brochure-out-now-in-four-more-languages

biogas.org

Safety First! brochure out now in four more languages

Safety First! brochure out now in four more languages