Marsh gas, also known as biogas, is a type of gas produced by the decomposition of organic matter in anaerobic conditions, such as in wetlands or swamps. It primarily consists of methane, which is a potent greenhouse gas, along with small amounts of carbon dioxide and other gases. This process occurs when bacteria break down plant and animal material without oxygen. Marsh gas can be harnessed as a renewable energy source. It is often collected from landfills or wastewater treatment plants and can be used for heating, electricity generation, or as a vehicle fuel. Proper management of marsh gas can help reduce greenhouse gas emissions and contribute to sustainable energy solutions.