The unprecedented increase in oil prices has researchers scrambling for alternative fuel sources. This crisis gives environmentally conscious researchers a new argument in favor of renewable energy. Unfortunately, most renewable energy sources are either inefficient or too expensive. Vehicles around the world are creating a massive environmental problem. Researchers are now looking for an economical and useful alternative to fossil fuel. This article demonstrates that biogas derived from household waste and manure can be used as an efficient fuel source for vehicles. A typical digester design is also shown here. It has been shown that an estimate of biogas production can produce around 1,000 m(3)/day in an urban area of around 40,000 population. A comparative statement of biogas production for water hyacinth-cow dung mixture and domestic waste is also shown as a case study.