Ключевые слова: abstract, accept, awareness, banner, blue, campaign, concept, conservation, day, design, drop, ecology, element, environment, essential, eye, flat, graphic, hand, highly, human, icon, illustration, importance, iris, isolated, life, march, natural, necessary, outline, precious, protect, realize, ripple, save, see, sign, symbol, think, understand, universal, value, vision, water, world, worth,