Define Unintentional Adulteration - Types of Adulteration?

These are the contaminations occur unknowingly or incidently in the food during harvesting, handling, transportation, processing, storage, distribution etc. because of ignorance or carelessness or lack of proper facilities. These adulterations may occur because of pesticides and insecticide residues, microorganisms, heavy metals like arsenic, copper, etc. These are injurious to health if consumed for a long time and may lead to organ failure and even death. For example, shellfish contain toxins derived from plankton on which it lives. Argemone oil may contaminate mustard oil accidently.