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Please enable JavaScript on your browser to best view this site. What makes it renewable? But it comes from a different source. Consideration of its uses and benefits, then, becomes part of the larger question of biogas pros and cons.
Natural gas, a fossil fuel, has flowed through our pipelines for more than a century.
What are fossil fuels?
It resulted from the decomposition of organic matter millions of years ago. We use it to generate electricity, heat buildings and water, and cook food. As compressed natural gas or liquified natural gas, it serves as transportation fuel.
Its chief component, methane, is a potent greenhouse gas. Much of it escapes into the atmosphere during the process of extracting it from the ground. When we think of biogas, we usually mean something else. It arises from landfills and other manmade sources.
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In that form, it is interchangeable with conventional natural gas. It can be sent through the same pipelines and put to all the same uses. Modern landfills place waste in an environment with no air. Anaerobic bacteria feast on the organic portion of it and excrete biogas.
Uses of renewable natural gas
Elsewhere, anaerobic digesters accomplish the same purpose. Cellulose from agricultural wastes and energy crops can also be turned into usable biofuels, including biogas and ethanol.
Technological and economic problems have so far prevented their commercialization. As long as anything lives, eats, and dies, the world will never run short of biogas. It is an infinitely renewable energy source. Collecting renewable natural gas prevents methane from escaping into the atmosphere.]
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