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  2. Renewable energy - Wikipedia

    en.wikipedia.org/wiki/Renewable_energy

    In contrast, controllable renewable energy sources include dammed hydroelectricity, bioenergy, or geothermal power. Percentages of various types of sources in the top renewable energy-producing countries across each geographical region in 2023. Renewable energy systems have rapidly become more efficient and cheaper over the past 30 years. [3]

  3. Energy - Wikipedia

    en.wikipedia.org/wiki/Energy

    The word energy derives from the Ancient Greek: ἐνέργεια, romanized: energeia, lit. 'activity, operation', [4] which possibly appears for the first time in the work of Aristotle in the 4th century BC. In contrast to the modern definition, energeia was a qualitative philosophical concept, broad enough to include ideas such as happiness ...

  4. Outline of energy - Wikipedia

    en.wikipedia.org/wiki/Outline_of_energy

    Energy crisis, the need to conserve energy resources; Energy development, development of energy resources — ongoing effort to provide abundant and accessible energy, through knowledge, skills and construction; Embodied energy, the sum total of energy expended to deliver a good or service as it travels through the economy

  5. World energy supply and consumption - Wikipedia

    en.wikipedia.org/wiki/World_energy_supply_and...

    If the final energy delivered for consumption is E and the EROI equals R, then the net energy available is E-E/R. The percentage available energy is 100-100/R. For R>10 more than 90% is available but for R=2 only 50% and for R=1 none. This steep decline is known as the net energy cliff. [28]

  6. Energy in the United States - Wikipedia

    en.wikipedia.org/wiki/Energy_in_the_United_States

    The state with the lowest per capita energy use is Rhode Island, at 161 million BTU per year, and the highest is Louisiana, at 908 million BTU per year. Energy use and prices often have an inverse relationship; Hawaii uses some of the least energy per capita but pays the highest price on average, while Louisiana pays the least on average. [75]

  7. 1 Renewable Energy Stock to Buy in 2025 and Hold for Decades

    www.aol.com/1-renewable-energy-stock-buy...

    The green energy powerhouse you need to know. The name is a big hint. ... Full-year sales rose by 6% in 2024 for Brookfield Renewable, and funds from operations (FFO) jumped 10% higher. With so ...

  8. Op-Ed: Pennsylvania’s energy mandate - AOL

    www.aol.com/op-ed-pennsylvania-energy-mandate...

    Pennsylvania’s natural gas industry plays an equally important role in meeting the needs of American consumers, providing access to energy that’s affordable and available 24/7.

  9. Units of energy - Wikipedia

    en.wikipedia.org/wiki/Units_of_energy

    Energy is defined via work, so the SI unit of energy is the same as the unit of work – the joule (J), named in honour of James Prescott Joule [1] and his experiments on the mechanical equivalent of heat. In slightly more fundamental terms, 1 joule is equal to 1 newton metre and, in terms of SI base units