Ключевые слова: background, breath, cancer, care, concept, conservation, day, design, development, disease, earth, ecology, energy, environment, epidemic, green, health, human, illness, infect, international, issue, life, lung, medicine, mold, nobody, patient, pneumonia, pollution, protection, pulmonary, renewable, respiratory, sickness, sustainability, sustainable, symbol, symptoms, tuberculosis, virus, world,