Biogas is pathogen-free because
A. anaerobic digestion removes pathogens and bacteria
B. it is toxic to pathogens
C. during decomposition, it produces antibiotics
D. cattle dung is pathogen-free
Answer:C
Biogas is pathogen-free because
A. anaerobic digestion removes pathogens and bacteria B. it is toxic to pathogens C. during decomposition, it produces antibiotics D. cattle dung is pathogen-free