To keep the trees from pine resin is still alive. In a similar way to collect nectar (Syrup) from maple trees, which means this will not harm the tree.
The resin is collected from trees that were alive. A way similar to how to collect nectar (Syrup) from maple trees. This method will not harm the tree.
To turpentine to from the tree is still alive. With the way similar to the way to keep the syrup (Syrup) from the maple trees, which this method is harmless to the tree!