August 09, 2013 - Pete Johnson of Gemini Rope Access Solutions, inspects the blades of a 3MW Alstom wind turbine by repelling down the blades. The turbine is undergoing testing at NREL's National Wind Technology Center (NWTC) in Boulder, Colorado. (Photo by Dennis Schroeder / NREL)

[DIGEST: Gizmodo, Digital Trends BBC, NYT, CNBC, QZ]

Renewable energy has been steadily expanding its market share over the past decade, and as technologies have improved and costs have come down, output has gone up — way up. The record-breaking test run of a new giant wind turbine in Denmark is another indicator that green energy is ready to become a dominant force in the global energy mix.

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