korean: 제가 관심을 두고 있는 또 다른 문제는 어느 생태학자가 제기한 것입니다. 기본적으로 그 생태학자가 한 것은 1리터의 석유에 얼만큼의 탄소가 들어있고, 얼만큼의 유기성분이 들어있느냐를 계산한 것입니다.
english: And another idea that I had as well, that was brought forward by an ecologist -- he basically did a calculation where he took one liter of gas and said, well, how much carbon it would take, and how much organic material?