Ключевые слова: abstract, art, care, celebration, circle, city, clean, climate, day, design, drop, earth, electricity, environment, flat, flower, global, growth, hand, house, icon, icons, illustration, june, leaf, map, modern, nature, organic, outline, paper, plant, pollution, protection, purity, recycling, set, sign, station, sun, symbol, technology, template, tree, turbine, water, wind, windmill,