ECO2 %EC%9E%85%EB%A0%A5%EC%A1%B4 %EA%B4%80%EB%A0%A8%ED%95%B4%EC%84%9C %EA%B6%81%EA%B8%88%ED%95%9C%EA%B2%8C %EC%9E%88%EC%8A%B5%EB%8B%88%EB%8B%A4.