100% renewable gas? Really?
Is it not misleading to describe biogas generated from food waste and livestock farming as 100% renewable? We know that modern intensive farming is one of the largest fossil fuel consumers and greenhouse gas emitters by sector. We also know that much food waste is avoidable (up to 50% according to some estimates). To refer to it as a renewable source material implies the embedded fossil fuel component is entirely discountable because this waste is both unavoidable and valueless otherwise. However, numerous studies show that food waste is largely avoidable and with simple thermal treatment, suited to animal feed, which makes much better use of it than anaeribic digestion. Furthermore the rise of anaerobic digestion creates a false impression that food waste isn't waste alongsidr a perverse economic disincentive to reduce it. Surely, the only truly renewable means of producing gas is from solar energy, by electrolysis, thermal dissociation or biofuels (corrected for non-renewable inputs and change if land use)?