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Wikipedia: Organic material or organic matter is any material which originated as a living organism and therefore contains carbon. Most organic materials are capable of decay. They are found in soil and elsewhere, and may include still-living material, such a cell culture.
Examples of organic materials are wood, linoleum, straw, humus, adobe, manure, bark, crude oil and cotton.
The use of organic materials is high on the agenda of many popular environmental groups. Due to the popular belief that organic materials are environmentally friendly whereas "conventional" materials are not, is often forgotten (and sometimes denied) that fossil fuels and other highly processed organic materials do in fact fall into this category.
Source: wikipedia
"yeah this is a pretty sweet site, I used it on my Smoot project for organic materials, maybe there should be subsets of organic materials on this site though"