Ключевые слова: abstract, africa, alternative, backgrounds, ball, bunch, business, clean, closeup, color, communications, concepts, conservation, design, energy, environment, environmental, freshness, global, globe, grass, green, growth, ideas, illustration, isolated, land, lawn, leaf, leaves, macro, map, nature, no people, organic, pattern, physical, planet, plant, pollution, recycling, sitting, space, sphere, summer, symbol, top, world,