Raising three beef cattles, Karjono has been blessed with one fortune after another. Not only that he has good investment as he can sell any of his beef cattle whenever he needs cash. Teletong or cow manures have also bring in some fortunes to him. Through BIRU (Domestic Biogas) Programme, this 50 year old man processes his cattle manures into a source of energy. In addition to light up his pressurized paraffin lamp, the gas produced by his 8 cubic meter capacity biogas reactor in his backyard is also useful for fueling the gas stoves.