here is a link to the earth tub I mentioned in class on Friday... more for commerical or neighborhood/community wide use. http://www.compostingtechnology.com/invesselsystems/earthtub/
also a link to the Eugene Schools best practices manual- which talks about how they switched to composting at 7 elementary schools with earth tubs http://http://www.uoregon.edu/~recycle/PDFdocuments/EarthTub.pdf
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