Ключевые слова: black, blue, clean, color, drop, droplet, eco, ecology, editable stroke, energy, environment, environmental, environmental conservation, flat, fluid, formula, fresh, glyph, h20, h2o, healthy, hydrogen, icon, illustration, isolated, keep, line, logo, molecule, nature, outline, pictogram, pure, raindrop, resources, set, silhouette, solid, symbol, water, white background,