| http://www.w3.org/ns/prov#value | - The majority of this overall jump can be attributed to the wind generation, which doubled over the same time period. ??? Overall public and private investment in clean technology dropped 42 percent to $3.75 billion in 2012, returning to 2008 levels, due to factors including market uncertainty, changes in national policy, and the maturation and consolidation of companies in the sector.
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