Agricultural methane emissions, on the other hand, are largely generated from biological decomposition, livestock digestion, anaerobic decomposition of agricultural wastes and anaerobic activity in irrigated rice cultivation.

Anaerobic fermentation of organic substances to carbon dioxide and methane is a collaborative effort involving many different biochemical reactions, processes and species of microorganisms.

A mechanical biological treatment system is a type of waste processing facility that combines a sorting facility with a form of biological treatment such as composting or anaerobic digestion.

By converting cow manure into methane biogas via anaerobic digestion, the millions of cattle in the United States would be able to produce 100 billion kilowatt hours of electricity, enough to power millions of homes across the United States.

If we feed our food waste which is the current government favorite way of getting rid of food waste, to anaerobic digestion, which turns food waste into gas to produce electricity, you save a paltry 448 kilograms of carbon dioxide per ton of food waste. It's much better to feed it to pigs.