Ключевые слова: alternative, balance, biofuel, biomass, bright, change, climate, concept, conservation, creative, development, earth, eco, ecological, economy, ecosystem, efficiency, electricity, environment, environmental, fresh, geothermal, green, growth, harmony, idea, imagination, innovation, invention, life, light, natural, nature, plant, power, protection, recycle, renewable, responsibility, saving, soil, solution, source, spark, sustainability, technology, wellbeing, wind, world,