Unburnt carbon particles cause

Unburnt carbon particles chiefly cause respiratory problems by lodging in the airways and lungs.

Cardiac problems stem more from carbon monoxide and fine particulates entering the blood than from these coarse particles alone.

Throat problems are minor and secondary compared with the deeper respiratory damage.

Skin infection is not a typical result of inhaled carbon particles.

These particles form during incomplete combustion of fuels and appear as soot.

Masks and cleaner combustion reduce such particulate inhalation.