While solar PV and wind power are grabbing headlines, another clean energy revolution is silently taking place. From New York to Nairobi, from rural communities in China to the heart of the European Union, biogas and anaerobic digestion (AD) solutions are becoming increasingly larger and more common.
Anaerobic digestion is a biological process happening naturally that breaks down organic matter in an airless environment, resulting in the generation of methane and carbon dioxide (among other things, see below). Capturing and putting to good use these methane emissions from our many waste streams could limit climate change drastically. According to the IPCC, this greenhouse gas is 86 times more potent than carbon dioxide over a twenty-year period (and 34 times more potent over a century).