Human health and car exhausts

Living organisms need different amounts of "heavy metals", such as iron, cobalt, copper, manganese, molybdenum, zinc and selenium. The consumption of these minerals is necessary and important to maintain the metabolism process in the organism's body.

Heavy elements are divided into basic elements and non-essential elements, as the basic elements are important for the functioning of enzymes such as Zn++, Mg++, where these elements act as co-factor ions (necessary for cell metabolism in low concentrations), while non-essential heavy elements are toxic to the cell and its components. It can destroy cell components at low concentrations, such as cadmium, Cd, and lead Pb.

The danger of heavy metals stems from their ability to accumulate in the bodies of marine organisms such as: fish and crustaceans, and the consumption of large quantities of them that contain high concentrations of heavy metals leads to human poisoning, which is the final consumer of these organisms, which is known as (heavy metal poisoning), where they accumulate within the body faster than being degraded through metabolism or excreted.