In the last year or so, electric-utility industry followers have been hearing about the "disruptive force" of distributed generation-how the growing number of solar panels sprouting on rooftops could be upending utility business models. Now, it seems, a potentially more powerful disruption could cause further damage to these companies' bottom lines, as significant energy-efficiency improvements across all building types are leading us to use less of their product-electricity-even as the economy improves.
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