This dimension groups energy sources by the era in which they were first put to commercial use. Wikipedia notes that "renewable energy systems have rapidly become more efficient and cheaper over the past 40 years," a commercial history that stretches back much further for some sources than others. Browsing by first commercial era lets a visitor compare sources that entered commercial use in the same period.
Facts
Comparison
Physical Basis First Commercial Era
Sources
1. Energy carrier - Wikipedia
Energy carrier, Introduction section, definition sentenceQuote, Energy carrier, Introduction section, definition sentence
An energy carrier is a substance (fuel) or sometimes a phenomenon (energy system) that contains energy that can be later converted to other forms such as mechanical work or heat or to operate chemical or physical processes.
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