Biogas power from U.S. cow manure

The linked article describes large scale biogas production in Texas and California. Biogas can be used to produce electricity or can be upgraded as a direct replacement for natural gas. This upgraded biogas can be injected into the natural gas pipeline grid. The Texas facility processes manure from a nearby farm and mixes it with food waste. The output is able to power a little more than one house for every cow. If you add up the confined livestock numbers in the U.S., you will quickly see that the power potential is astounding, not to mention the great reduction in pollution. In the process of extracting biogas, manure is transformed into a fertilizer that is much more valuable for farmers and far less polluting, less reactive than the original manure.
Power from cow poo heats homes — Plenty Magazine