About 100 times the world's total energy demand at that same moment, according to New York-based researcher Weather 2000.

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The aim: increase the non-fossil fuel supply component to 15% of the total primary energy demand by 2020.

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So despite the fact that our homes have become remarkably more energy efficient with a nearly one-third drop in total energy per square foot, residential energy demand didn't go down--it went up about a third over the two-decade period.

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Computer servers now account for over 2% of total U.S. energy demand.

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With the recent confirmation of the Leviathan field, an offshore natural gas discovery able to meet total domestic demand for approximately 40 years, Israel has entered a new and potentially remarkable era of energy exploration and production.

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