unburned fuels

Is Unburnt Fuel Bad? Benzene (C6H6) – This occurs naturally in petrol and diesel in very small quantities and is also emitted from vehicle exhausts as unburnt fuel. Benzene is a carcinogenic substance and high levels of inhalation can severely harm human health. What causes unburnt hydrocarbons? Unburnt Hydrocarbons are able to cause cancer. Hydrocarbons