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This timeline of sustainable energy research from 2020 to the present documents research and development in renewable energy, solar energy, and nuclear energy, particularly regarding energy production that is sustainable within the Earth system. Renewable energy capacity has steadily grown, led by solar photovoltaic power. [1]
English: The vertical access is the percentage of fossil vs non-fossil sources in the energy mix. The horizontal access is time from 2016 to 2050. Various source 'peaks' are shown and milestones in the trasition flagged in their projected positions on the timeline.
An energy transition is a broad shift in technologies and behaviours that are needed to replace one source of energy with another. [14]: 202–203 A prime example is the change from a pre-industrial system relying on traditional biomass, wind, water and muscle power to an industrial system characterized by pervasive mechanization, steam power and the use of coal.
The word energy derives from Greek word "energeia" (Greek: ἐνέργεια) meaning actuality, which appears for the first time in the 4th century BCE in various works of Aristotle [1] when discussing potentiality and actuality including Physics, Metaphysics, Nicomachean Ethics [2] and On the Soul.
Scientists at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have set a world record in solar cell efficiency with a photovoltaic device that converts 40.8% of the light that hits it into electricity. However, it was only under the concentrated energy of 326 suns that this was achieved.
The development of renewable energy and energy efficiency marked "a new era of energy exploration" in the United States, according to former President Barack Obama. [9] In a joint address to the Congress on February 24, 2009, President Obama called for doubling renewable energy within the following three years.
Renewable Energy History in the US. Wood was the primary energy source in the U.S. until the mid-1800s, but a lot has changed since then. Fossil fuels like coal, petroleum and natural gas emerged ...
Renewable energy often displaces conventional fuels in four areas: electricity generation, hot water/space heating, transportation, and rural (off-grid) energy services. [22] Although almost all forms of renewable energy cause much fewer carbon emissions than fossil fuels, the term is not synonymous with low-carbon energy.