When Quorn® was first marketed it was described as being 'mushroom in origin' What does this mean?

Explanation:

Though until recently the manufacturer's (Marlow Foods) advertising and labeling implied that the product is “mushroom protein” or “mushroom in origin,” the mold (or fungus) from which it is made does not have much to do with mushrooms. Rather, the mold is grown in liquid solution in large tanks

the answer is trees if i'm not mistaken

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.