One key determinant of the answer is the staggering scale of energy demand brought forth by 100 years of unprecedented population growth, coupled with an equally remarkable growth in per capita demand of industrial energy forms.

• 回答这个问题的关键是要看过去一百年中由于史无前例的人口增长而带来的能源需求的惊人增长，同时，工业能源人均需求的增长也同样明显。