Anaerobic digestion is a biological process that breaks down organic matter, such as food waste, agricultural residues, and sewage sludge, in the absence of oxygen. This process converts the organic material into biogas, which is mainly composed of methane and carbon dioxide. Anaerobic digestion is a sustainable waste management solution that can reduce greenhouse gas emissions, produce renewable energy, and create valuable byproducts such as nutrient-rich fertilizers. It is a promising technology for both reducing carbon footprints and generating clean energy in various sectors, including agriculture, wastewater treatment, and food processing industries.