Why does wood grow mushrooms and green stuff that grows up?

[Telekinetic-Potato]

It looks so gnarly

[MTC29]

Wood, unless properly sealed and treated, is a porous and absorbs and holds excess water and moisture. Mold growth is due to wood's cellulose and moisture content, cellulose being common food source for mold, which is source of concern in the building industry.

Bachelor of Science, Civil Engineering, structural engineer.
Master of Engineering, Materials Science.

[Telekinetic-Potato]

So does the mold turn into a fungus? How does it get there? Is that picture showing mold and fungus?

Thank you for a real answer by the way

[Astarlessnightsky]

Moss and Mushrooms grow everywhere, it just needs to be moist and dark.

[purplepoppy]

It's called nature and its an event that happens in the wild. Fungi feed on dead wood breaking it down produce fruiting bodies we call mushrooms.

[AFretiredTXn]

Moist areas.