Ключевые слова: alternative, bio, car, cell, check, colored, earth, eco, ecological, ecology, electric, emblem, energy, environment, environmental, forest, friendly, fuel, global, globe, green, hand, house, icon, label, leaf, line, linear, manage, management, mark, nature, organic, outline, plant, pollution, power, recycle, recycling, renewable, resource, set, solar, source, symbol, technology, waste, water, world,