GRAND RAPIDS, Mich. — On one of the most humid days of the year, it feels even more so inside the new biodigester in Grand Rapids. The biodigester has to be kept at 98 degrees. No more, no less. The ...
On a small patch of land, Malachi Symonds has an orchard bursting with fruit. One citrus tree alone carries more than 150 lemons. His secret is a fertiliser he makes with his new biodigester, a ...
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