The ancient activity of human consumption of trees has expanded to an ever-growing demand for timber products. Most of these products are used in primary sustainable operations that saw lumber or chip wood used as composites and paper that require severing timber. There are also trees that survive each harvest to yield their fruits, oils, sap and bark.
There is a classification of products called non-timber forest products or NTFPs which do not necessarily depend on cut trees. These products always come from a forest but are not collected or made from a cut tree. Learn more about NTFPs by following the above link and for the best site on timber and tree products, check out the United States Forest Service site - the Forest Products Laboratory.