Our Energy Problem Is a Quantity Problem

(This post consists of a short overview article I recently wrote for Transform, a magazine for Environment and Sustainability Professionals, plus six related Questions and Answers.)

Reading many of today’s energy articles, it is easy to get the impression that our energy problem is a quality problem—some energy is polluting; other energy is hoped to be less polluting.

There is a different issue that we are not being told about. It is the fact that having enough energy is terribly important, as well. Total world energy consumption has risen quickly over time.

Figure 1. World Energy Consumption by Source, based on Vaclav Smil estimates from Energy Transitions: History, Requirements and Prospects and together with BP Statistical Data for years 1965 and subsequent.

In fact, the amount of energy consumed, on average, by each person (also called “per capita”) has continued to rise, except for two flat periods.

Figure 2. World per Capita Energy Consumption with two circles relating to flat consumption. World Energy Consumption by Source, based on Vaclav Smil estimates from Energy Transitions: History, Requirements and Prospects (Appendix) together with BP Statistical Data for 1965 and subsequent, divided by population estimates by Angus Maddison.

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