This dimension groups energy technologies by the era in which they were first invented. Wikipedia notes that "renewable energy systems have rapidly become more efficient and cheaper over the past 40 years," a span of invention and refinement that stretches back through several distinct eras. Browsing by invented era lets a visitor compare technologies that first appeared in the same period.
Facts
Comparison
Era of Emergence Physical Basis Invented Era
Sources
1. Heat engine - Wikipedia
History, industrial revolution practical useQuote, History, industrial revolution practical use
Heat engines have been known since antiquity but were only made into useful devices at the time of the industrial revolution in the 18th century.
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