The Detroit Zoo is cleaning up its act with a plan to be the first U.S. zoo biodigester. The project, costing $1.1 million, will convert the 400-500 tons of manure and other organic waste produced […]
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The Detroit Zoo is cleaning up its act with a plan to be the first U.S. zoo biodigester. The project, costing $1.1 million, will convert the 400-500 tons of manure and other organic waste produced […]