Fungi help humans in a variety of ways, such as their role in removing decaying organic matter, their use in certain medicines and insecticides and their role in farming and as food sources. Fungi are decomposers that break down dead matter, providing nutrients for soil that humans then use to plant crops. Penicillin, which is an antibiotic used to save lives from bacterial infections, is produced from fungi.
Fungi are also useful as biological pesticides for certain types of insects that attack planted trees and crops. Fungi are also beneficial for farmland because they form a symbiotic or mycorrhizal relationships with plants where they colonize their root systems to help with nutrient absorption.
Fungi, such as mushrooms, are a food source for humans. Yeasts, which are classified as fungi, are also utilized in the production of wine and beer products.