During the last years, humanity has consumed about 500 exajoules of energy per year (an exajoule is a million million megajoules, or 1018 joules). As usual, levels of energy consumption vary strongly from country to country. While the average consumption per person is about 70 GJ (gigajoules), the inhabitants of Bangladesh, Eritrea, and Senegal use less than 10 GJ on average.
At the other extreme, the inhabitants of the United Arab Emirates and Iceland use 450–500 GJ per year, while per-capita usage in the small emirate of Qatar is a whopping 900 GJ. Germany uses about 180 GJ per person—more than twice the global average. Other Middle European countries are similar, while the United States and Canada use twice as much (330–350 GJ).
Is it realistic that in the future, everybody will reach the consumption level of Germany or the USA, or even more? (mehr …)