With green wood, you can start building right away without having to wait for the wood to dry or having to pay the additional cost of kiln drying, which uses environmentally harmful fossil fuels during the drying process. However, fresh wood will shrink as it dries. However, green wood has its advantages in some cases. Wood with a high moisture content is much easier to cut and shape than very dry wood. This is a great advantage when working with hand tools, as the softer structure of the tissue requires less muscle force to manipulate it.
That's why old-fashioned tasks, such as making shoes or wooden utensils, were always done with green wood.