Biogas has become a method of sustainability, since fossil fuels, as well as the different forms of energy that share space with humanity, are not always economically viable or have the availability of raw materials to generate electricity. Choosing an energy source that meets nature's need for conservation and recycling shows wisdom and intelligence, given that human beings act in a destructive and environmentally suicidal way. Various possibilities are being tested, and this is just one contribution to studies and research into the themes of "sustainability" and "energy". It's worth every gamble and investment when it comes to survival.