Energy

The graph plots the per capita average energy consumption rate (for 2006) versus the per capita income for all countries with more than 20 million inhabitants, more than 90% of the world's population. To obtain the yearly energy usage per capita in joules, multiply the rate in kW by 3.15 x 1010 (Note: for engineers, 1 BTU = 1.055 x 103 joules). With a population of about 300 million, the US consumed 1017 BTUs in 2006. The total worldwide energy consumption in 2006 was about 5 x 1017 BTU. For comparison, the total energy from the Sun reaching the Earth's surface in one year is about 3 x 1021 BTUs. Click on the graph to increase its size.

World Energy Usage (2006)
Fossil fuels represent 85% of the total world energy usage.
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Sources of electricity in the U.S. in 2006. Fossil fuel generation (mainly coal) was the largest source.
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* MIT World at http://mitworld.mit.edu/ has many videos of presentations and panel discussions on the topic of energy. Go to this site and use the search term "energy" to find them. We have only given a few examples from this treasure.

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