This dimension marks how mature a specific energy technology actually is, experimental, emerging or fully commercial. Wikipedia notes that "in some geographic localities, photovoltaic solar or onshore wind is the cheapest new-build electricity," a sign of just how mature those particular technologies have become. Browsing by maturity separates technologies still emerging from those already fully commercial.
Facts
Comparison
Era of Emergence Physical Basis Maturity
Sources
1. Wind turbine - Wikipedia
History, Friedlander 1883 wind turbineQuote, History, Friedlander 1883 wind turbine
The first electricity-generating wind turbine was installed by the Austrian Josef Friedlander at the Vienna International Electrical Exhibition in 1883.
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