Ключевые слова: alternative, bio, biology, conceptual, conservation, copyspace, design, doodle, earth, eco, ecology, ecosystem, energy, environmental, friendly, future, global, go, grain, green, growth, health, heart, idea, innovation, leaves, lettering, message, planet, postcard, poster, process, protection, recycle, reduce, reminder, renewable, resource, reuse, rustic, save, solar, solution, symbol, think, together, type, warming, welfare, wooden, world,