Data by itself is necessary, but not enough, for practical applications.
What's needed is knowledge about how to use the data to answer questions -- such as, "how much could the US save through energy independence?"
There's emerging technology that leverages social media for the huge task of acquiring and curating the necessary knowledge -- in the form of executable English.
One can Google "executable English" to find this.
Imagine data.gov, in 2010, being able to answer the above question, and many others, and also explaining the answers in English.
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