Ключевые слова: atom, bacteria, battery, bio, car, concept, design, drop, ecology, energy, environment, environmental, factory, flower, fuel, garbage, globe, green, hand, hazard, head, icon, icons, illustration, industry, leaf, lightbulb, line, molecule, natural, nature, people, plant, pollution, power, radiation, recycle, recycling, set, shape, solar, sun, symbol, thermometer, tree, turbine, virus, water, wind,