The whole idea stinks. But generating heat and power from livestock manure is appealing. The compost is placed into an oxygen-free machine that separates the methane gas and then uses it to create electricity to power farms or transport over the grid.

"We're absolutely the pioneers in this. The fact that we can take manure and other materials and digest them and make viable natural gas means the market is really unlimited. It's only limited by how many cows and hogs you have in feedlots." -- Pat Chase, Microgy, Texas regional manager