
Fungi can do great things for us. One of the most important things that some fungi can do is to break down wood. Without them we would have lots of waste wood around, and there wouldn't be enough goodness in the soil for plants to grow.
Some fungi help trees and other plants to grow by capturing water and nutrients for them, in return the trees and other plants give the fungi sugars that they make during photosynthesis.
Some fungi make medicines such as penicillin whilst others make foods such as marmite, cheese, bread and beer.
Some fungi can cause diseases while others provide food for animals in the ecosystem.

image of mycelium © L.Boddy