Ключевые слова: agriculture, background, business, care, city, concept, conservation, development, earth, eco, ecological, ecology, energy, environment, environmental, forest, friendly, future, global, green, growth, hand, icon, illustration, industry, leaf, natural, nature, organic, people, plant, pollution, power, protection, recycle, recycling, renewable, save, science, sign, social, sustain, sustainability, sustainable, symbol, technology, tree, water, world,