Ключевые слова: alternative, beach, beginning, blackboard, business, chalkboard, chance, change, cheerful, clean, climate, concept, conservation, crisis, development, eco, ecological, ecology, economic, efficiency, electricity, energy, environment, friendly, future, global, green, growth, happiness, industry, investment, natural, nature, power, renewable, responsible, save, save the earth, seaside, sky, social issues, start, sustainability, sustainable, technology, turbine, vision, wind, wind turbine, windmill,