Ключевые слова: alternative energy, awareness, background, change, city, clean, climate, community, concept, conservation, copy space, daylight, design, development, digital, earth, eco, ecology, energy, environment, environmentally friendly, future, global, globe, green, growth, icon, illustration, isolated, nature, planet, planet earth, power, protection, renewable energy, resources, sustainability, sustainable, technology, wind turbine, world,