Like other cows in the Midwestern landscape, the animals at the Mead plant, part of an experimental scheme dubbed Genesis, churn out a steady supply of energy-rich excrement.
The 27,000 cattle stand on slatted floors to deposit an estimated 1.6 million pounds of dung daily into deep pits, which are located adjacent to a new ethanol plant.
The pungent waste is then processed into methane, which powers the ethanol plant in a closed-loop system.
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