Lawrence Livermore Labs, in its Energy Flow Diagram of the U.S. (based on 2009 data), gets us most of the way there.

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My marked-up version of the energy flow diagram (above) reveals a rough estimate about 15.7 Quads are used by individuals for personal transportation.

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The complicated display advertising ecosystem ( see diagram here) exacerbates work flow issues for agencies and their clients.

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What you see in the diagram above is that the framework maintains the in and out points of the WebKit flow, but takes a detour in the middle using its own physics engine, render engine and rules framework to replace the native WebCore functions.

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The diagram below, for the period March 9 through March 13, starts to illustrate how the flow unfolds.

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