그래서 25년전에 기름이 최고점을 차지했고 이것은 1920년대의 고점은 석탄이 였고 그것보다 100년 전에는 나무였던 것과 같습니다.
And so, 25 years ago, there was a peak oil; just like, in the 1920s, there was a peak coal; and a hundred years before that, there was a peak wood.