The black smoke.1. obscure visibility and dirt2. access to the accumulated in the lungs the lungs and air sacs hydrocarbons cause cancer.3. the black smoke is the substance that causes lung cancer and cause bronchitis.
Black smoke 1. Avoidance of visibility and the dirty 2.? Can enter the lungs accumulated in the lung alveoli. And a hydrocarbon cause cancer 3.? Black smoke is the substance that causes lung cancer and bronchitis you