Ключевые слова: background, brain, business, businessman, concept, conceptual, conservation, creative, design, development, eco, ecologic, ecological, ecology, energy, environment, environmental, fresh, friendly, green, human, idea, illustration, innovation, invention, leaf, man, mind, natural, nature, organic, pencil, person, plant, reflexion, save, science, solution, sustainability, symbol, symbolic, think, tree, white,