More poop-like is a plant’s ability to get rid of salt, metals, and other stuff by spreading it through its leaves, bark, heart wood, and roots. Mangrove trees, which often live in salty water, squeeze extra salt out of their leaves—so in a way, they poop salt. Other trees send wastes to their bark or heartwood, so if you are reading this on paper or sitting at a desk, chances are you are touching some tree poop right now. And those gorgeous leaves that turn color and drop in the fall? They are a great way for trees to get rid of material that isn’t particularly helpful: Beautiful, beautiful poop.