قبل 100 سنة كنا ننظر إلى الفحم، بالطبع، وقد كنا ننظر إلى زيت الحوت وقد كنا ننظر إلى زيت النفط الخام.
A hundred years ago we were looking at coal, of course, and we were looking at whale oil and we were looking at crude oil.