Ключевые слова: arrow, background, billboard roadsign, challenge, choice, choose, city, concept, confused, confusion, crossroad, decision, direction, eco, ecology, energy, environmental, global warming, green, guide, help, idea, industry, life, lost, nature, opportunity, options, pathway, poster, problem, protection, pullution, question, right, road, sign, smoking, solution, strategy, sustainability, sustainable, symbol, urban, walk, way, wrong,