Ключевые слова: beauty, blue sky, change, chlorophyll, ecology, energy, environment, environmental problem, environmental protection, evergreen, forest, fresh, fresh green, global environment, global warming, green, growth, health, heart, heart mark, heart shape, japan, landscape, leaf, life, looking up, nature, outdoor, park, photosynthesis, plant, power, season, sky, spirit, sunny, tree, woodland,