Meliyev Muzaffar Saidakbarovich, Axmadjonova Zulxumorxon Nazirjon qizi and Mo’vinova Shoiraxon Iqboljon qizi 2021. Ecological Features of Biogas Production. International Journal on Orange Technologies. 3, 3 (Mar. 2021), 214-216. DOI:https://doi.org/10.31149/ijot.v3i3.1466.