Renewable energy is becoming crucially important as concern over burning fossil fuels is increasing and the price of oil continues to rise. Biogas technology has undergone great developments since the first designs in the 1970s. Large national projects are working very effectively in countries such as Nepal, India and China, where hundreds of thousands of biogas plants have been installed; Europe has a fast-growing interest in biogas technology.

Small-scale Rural Biogas Programmes focuses on biogas extension programs in these countries and demonstrates the applicability of...