Why are whole forest's products made from different types of wood?
Typically, the building market only demands a few highly valuable, "well branded" wood species. Once all of those species have been harvested from a forest, the forest no longer has any financial value to the land owners. In order to continue to make a living, the landowners must clear-cut the land to repurpose it for cattle grazing or agriculture.
Whole Forest harvests a small quantity of 30 to 50 different species, at a rate of 2.5 trees per acre every twenty years. This keeps the value of the forest, and the balance of the ecosystem, intact. Locals now have an incentive to keep the forest as it is rather than clear-cut for agriculture. An intact forest keeps carbon sequestered, thus reducing global carbon emissions.