CBG, which stands for compressed biogas, is an aqueous type of biogas that has the potential to serve as a suitable replacement for compressed natural gas. The term "compressed" refers to the biogas's state of being compressed. The production of CBG from wet biomass, such as waste from the food industry, animal dung, or agricultural residue, can be accomplished through the utilization of a method that is known as hydro-processing. When compared to other, more traditional technologies, such as compressed natural gas, CBG has the potential to supply fuel in far bigger quantities at a price that is substantially lower. CBG plants do not need to handle raw materials on-site, which results in a reduction in the amount of investment capital and area that is required. Because of this, CBG plants can be more compact. Because of this, it is also feasible to generate within the confines of metropolitan regions.