Ключевые слова: april, background, bio, blue, business, care, cartoon, character, clean, concept, conservation, day, design, earth, eco, ecological, element, energy, environment, environmental, flat, friendly, global, globe, graphic, green, growth, icon, illustration, leaf, life, man, map, nature, ocean, organic, person, planet, plant, pollution, poster, protect, recycle, save, sign, sphere, symbol, tree, water, world,