Mycology is the study of fungi and is crucial to the bioeconomy. It provides resources and information on how to deal with fungi in daily life, and especially in relation to health like food safety, poisonous or toxic fungi, etc.
some useful germs are decompose the bread partical into alji or funjai that have a very bad smell also we can see fungus on bread this process is called decomposition. And decomposition of food, or any thing is every where held . I have a very short time but i must ans that question as according to my knowledge.