Ключевые слова: background, bio, blackboard, business, chalkboard, clean, communication, conservation, consumption, earth, easter, eco, ecologic, ecological, ecology, efficiency, energy, environment, environmental, field, fresh, grass, green, health, label, life, management, marketing, meadow, natural, nature, organic, plant, pollution, power, protect, protection, recyclable, recycle, recycling, reduce, responsibility, save, sign, spring, sustainability, technology, text, texture, word,