Ключевые слова: air, background, bronchi, bronchitis, cancer, care, chemotherapy, cigarette, cigarettes, clinic, color, concept, cough, cure, diagnosis, disease, doctor, examination, flat, green, health, human, illness, lay, leaves, lung, lungs, medical, medicine, nicotine, object, oncology, organ, paper, pneumonia, prevention, protection, pulmonary, red, respiratory, risk, shape, sickness, smoke, smoking, tobacco, top, treatment, tuberculosis, view,