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
Era of Emergence Physical Basis 20th century
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Sources
1. Waste-to-energy - Wikipedia
Waste-to-energy, History section, first attempts sentence
It was not until the late 19th century that the first attempts were made to produce energy from burning waste.
Waste-to-energy, lead section, combustion method sentence
The most common method of WtE is direct combustion of waste to produce heat, which can then be used to generate electricity via steam turbines.
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