Ключевые слова: alternative, art, artwork, biology, branch, breath, cancer, care, clean, concept, creative, eco, ecology, ecosystem, element, flat, foliage, fresh, graphic, green, health, human, idea, illness, leaf, lung, medical, metaphor, nature, organ, oxygen, petal, pneumonia, protection, pulmonary, respiration, respiratory, revival, save, shape, sign, silhouette, symbol, unhealthy, virus, vital,