Our lungs receive and transport air to be absorbed by the blood and they release carbon dioxide as waste. The air we breathe is contaminated with particles and toxins that cause a low quality of oxygen supply to the cells. Some signs of lung toxicity are : persistent cough, chest pain, shortness of breathe, fatigue, hoarseness, lost of appetite, recurring bronchitis or pneumonia, fever for unknown reason, swelling of neck and face, cold hands, congestion, and skin disorders.