At first I was a bit put off by this electricity-consuming gadget that makes compost, but then I learned that it uses only about fifty cents worth of energy a month, much less than a garbage truck would burn in diesel fuel to haul the same waste.

It will process up t 120 pounds of material per month. Items remain in the upper chamber, with “hot composting” conditions: mixing, air flow, heat, and moisture (see diagram). The energy released destroys odors, pathogens, and seed germination.

One batch of compost is sufficient for 10-40 sq ft (1-4 sq m) of a lawn or garden, applied once or twice per year. Or use one batch per mature fruit tree, once per year.

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