Ключевые слова: arrow, business, challenge, clean energy, concept, conceptual, decision, development, direction, eco, ecology, economic, economy, education, environment, environmental, forward, future, generation, go on, goal, green energy, growing, guidance, highway, human, inspiration, investment, learning, lines, motivation, power, relationship, renewable, responsibility, road, shadow, start, street, success, sunbeam, sunlight, sustain, sustainability, sustainable, think, vision, word, written,