Ключевые слова: air, alternative energy, beautiful scenery, believe, better world, breathe, clean, clean energy, co2, concepts, contemplation, cow, creativity, depollution, different world, dream, ecology, environmental protection, expectancy, freshness, future, grass, grassy meadow, green energy, green grass hair, happiness, hope, human brain, idea, inspiration, lake, landscape, look elsewhere, natural beauty, nature, o2, paradise, peaceful, pollution, problem, purity, question, recycling, serenity, sustainable energy, think, tree, utopia,