What pollutes food?

Answer 1

If you are referring to how food becomes contaminated then there are three types of contamination and two ways in which it can occur. The 3 types of ways food can be contaminated is by

Physical Contaminants:

Chemical Contaminants: Contamination of food through a chemical based product such as bleach

Biological Contaminants: Contamination from microorganisms such as, yeast, parasites, viruses, bacteria and mold

The 2 ways in which food can be contaminated is through

Direct Contamination: contamination of food from the original place it was produced, ie. salmonella on chicken,

Cross-Contamination: when food is contaminated from one food to another through a non-food object. Ie Apple is contaminated because you did not wash your hands( non food object) after cutting raw chicken.