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. Nuclear reactor - Wikipedia
WikipediaLead section, Chicago Pile-1 1942Quote, Lead section, Chicago Pile-1 1942
In 1942, the first artificial critical nuclear reactor, Chicago Pile-1, was built by the Metallurgical Laboratory.
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