Before the featured portal process ceased in 2017, this had been designated as a featured portal.
From Wikipedia, the free encyclopedia
Main page New articles & Tasks
Crystal energy.svg
The Energy Portal
Welcome to Wikipedia's Energy portal, your gateway to energy. This portal is aimed at giving you access to all energy related topics in all of its forms.
Page contents: Selected articleSelected imageSelected biographyDid you know?General imagesQuotationsRelated portalsWikiprojectsMajor topicsCategoriesHelpAssociated Wikimedia


Energy Arc (central electrode of a Plasma Lamp).jpg
A plasma lamp, using electrical energy to create plasma, light, heat, movement and a faint sound

In physics, energy (from Ancient Greek: ἐνέργεια, enérgeia, “activity”) is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The unit of measurement for energy in the International System of Units (SI) is the joule (J).

Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object (for instance due to its position in a field), the elastic energy stored in a solid object, chemical energy associated with chemical reactions, the radiant energy carried by electromagnetic radiation, and the internal energy contained within a thermodynamic system. All living organisms constantly take in and release energy.

Due to mass–energy equivalence, any object that has mass when stationary (called rest mass) also has an equivalent amount of energy whose form is called rest energy, and any additional energy (of any form) acquired by the object above that rest energy will increase the object's total mass just as it increases its total energy.

Human civilization requires energy to function, which it gets from energy resources such as fossil fuels, nuclear fuel, or renewable energy. The Earth's climate and ecosystems processes are driven by the energy the planet receives from the Sun (although a small amount is also contributed by geothermal energy). ( Full article...)

Selected article

Oil shale industry is an industry of mining and processing of oil shale—a fine-grained sedimentary rock, containing significant amounts of kerogen (a solid mixture of organic chemical compounds), from which liquid hydrocarbons can be manufactured. The industry has developed in Brazil, China, Estonia and to some extent in Germany, Israel and Russia. Several other countries are currently conducting research on their oil shale reserves and production methods to improve efficiency and recovery. However, Australia has halted their pilot projects due to environmental concerns.

Oil shale has been used for industrial purposes since the early 1601 when it was mined for its minerals. Since the late 1800s, shale oil has also been used for its oil content and as a low grade fuel for power generation. However, barring countries having significant oil shale deposits, its use for power generation is not particularly widespread. Similarly, oil shale is a source for production of synthetic crude oil and it is seen as a solution towards increasing domestic production of oil in countries that are reliant on imports.

Selected image

Polarlicht 2.jpg

Photo credit: Senior Airman Joshua Strang, United States Air Force
An aurora, caused by the release of energy as charged particles collide with atoms in the Earth's upper atmosphere.

Did you know?

Selected biography

Enrico Fermi (September 29, 1901 – November 28, 1954) was an Italian physicist most noted for his work on the development of the first nuclear reactor, and for the development of quantum theory. Fermi won the 1938 Nobel Prize in Physics for his work on induced radioactivity.

Fermi was well-known for his simplicity in solving problems. Whenever possible, he avoided complicated mathematics and obtained quick results based on order of magnitude estimates. Fermi also meticulously recorded his calculations in notebooks, and later used to solve many new problems that he encountered based on these earlier known problems.

After accepting the 1938 Nobel Prize in Stockholm, Fermi immigrated to New York with his family to escape the anti-Semitic laws of Fascist Italy, as his wife Laura was Jewish.

After working at Columbia University, Fermi went to the University of Chicago and began studies that led to the construction of the world's first nuclear reactor Chicago Pile-1 (CP-1). The first artificial, self-sustaining, nuclear chain reaction was initiated within CP-1, on December 2, 1942.

In the news

25 January 2023 – Iran and weapons of mass destruction
International Atomic Energy Agency Director General Rafael Grossi says that Iran has now amassed enough material for "several nuclear weapons", and calls for new diplomatic efforts in order to prevent Iran from developing a nuclear bomb. (CNN)
23 January 2023 –
A major power outage in Pakistan leaves nearly 220 million people without electricity after a failure at the national power grid. Earlier this month, Prime Minister Shehbaz Sharif ordered a reduction in energy consumption as the country faces a severe energy crisis. (CNN) (Reuters)

General images

The following are images from various energy-related articles on Wikipedia.


Related portals


Major topics


Torchlight help icon.svg

Puzzled by energy?
Can't answer your question?
Don't understand the answer?

For further ideas, to leave a comment, or to learn how you can help improve and update this portal, see the talk page.

Associated Wikimedia

The following Wikimedia Foundation sister projects provide more on this subject:

Discover Wikipedia using portals

Purge server cache