With the help of biogas digesters, the waste products of herbivores can be used to generate gas for stoves, heat and even electricity. It is well-known that, thanks to the large amount of dung that they produce, elephants are a perfect candidate for this purpose. As the digesters break down the organic waste, methane and carbon dioxide are collected to be used in stoves or gas-powered engines. Nutrient-rich bio-slurry is also created during this process, which can then be used as a fertiliser. Biogas from manure is not effective enough to meet all of our energy needs, but if used correctly in combination with other processes, it could have a beneficial impact on the world by saving natural fossil resources.