The Forestry Mod is one of the most complex mods I, as well as possibly you, have ever seen. It greatly expands upon the simple-by-comparison lumber harvesting and adds a near industry to the game. It’s a bit much to explain within the confines of this small article, but essentially it adds new materials (such as copper) which you can use to build machinery in-game. Said machinery is used to harvest lumber with extended realism, much moreso than the basic punching or chopping of trees.
If you are bothered by how unrealistic the standard wood labor is in Minecraft and want to get your hands dirty, look no further. Props to the creator for such an extensive and complex overhaul. I couldn’t even begin to imagine creating such an addition to this game.
Copper, as found in the mod.