Does anyone have any information on exceptions to the "rule" that most wood + glue bonded products will 'rot down' to something that is essentially harmless in due course ? This has a New Zealand focus, but comments from elsewhere re exceptions may be useful. I'm interested in the "compostability" of various types of composite wood products. Especially, is a given source material liable to result in decomposition products which are harmful to people, animals, soil organisms or plants? Product names include: MDF, particle board, chip board, bison-board, fibreboard, customwood, OSB* (less likely: plywood, triboard). ... * (Oriented Strand Board). *NOT*: cement bonded boards, melamine products (MFC, ...) . I'm less concerned about emissions "along the way" (eg formaldehyde) and time taken to decompose, but any information on these aspects may be useful. There is a lot on this subject on the internet. Knowing what you start with "seems likely" to be a necessary step towards knowing what you end up with. Russell _____________________________ * A Literature Review on the Composting of Composite Wood Products 2007 * http://www.mitchellplainfarm.com/uploads/2/9/4/4/2944849/compwoodreview.pdf International yellow pages list of particle board companies: http://www.business-yellowpages.com/Particle-Board/24714/page-6 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .