Bitcoin compared to what? New index shows energy consumption
Bitcoin has landed front and center in the ongoing debate over benefits of cryptocurrencies and impact on the environment.
Energy & Green Tech
Bitcoin has landed front and center in the ongoing debate over benefits of cryptocurrencies and impact on the environment.
Engineering
Researchers have developed a method to stabilize a promising material known as perovskite for cheap solar cells, without compromising its near-perfect performance.
Dec 23, 2021
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Energy & Green Tech
The European Union reached a deal Thursday to almost double the share of renewables in the 27-nation bloc's energy consumption by 2030 amid efforts to become carbon neutral and ditch Russian fossil fuels.
Mar 30, 2023
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Energy & Green Tech
Past research suggests that climate change and energy systems have a bidirectional relationship. In other words, just like emissions from energy systems can fuel climate change, climate change could also expose the vulnerabilities ...
Energy & Green Tech
A global search for alternative sources to Russian energy during the war in Ukraine has refocused attention on smaller, easier-to-build nuclear power stations, which proponents say could provide a cheaper, more efficient ...
Sep 10, 2022
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Engineering
Nuclear energy provides more carbon-free electricity in the United States than solar and wind combined, making it a key player in the fight against climate change. But the U.S. nuclear fleet is aging, and operators are under ...
Dec 18, 2020
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Software
In recent decades, technological advances have opened up exciting new possibilities for research in a variety of fields, including physics. Nonetheless, creating sophisticated simulations to represent or address multiphysics ...
Energy & Green Tech
An analysis published in the journal Science found that, contrary to a widely held assumption, the high assay low-enriched uranium (HALEU) now being produced with federal subsidies to fuel the next generation of small nuclear ...
Jun 6, 2024
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Energy & Green Tech
The U.S. nuclear industry is generating less electricity as reactors retire, but now plant operators are hoping to nearly double their output over the next three decades, according to the industry's trade association.
Jun 21, 2022
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Energy & Green Tech
In the grounds of the ravaged Fukushima Daiichi nuclear plant sits a million-tonne headache for the plant's operators and Japan's government: tank after tank of water contaminated with radioactive elements.
Oct 5, 2019
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A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter; a modern thermonuclear weapon weighing little more than a thousand kilograms can produce an explosion comparable to the detonation of more than a billion kilograms of conventional high explosive. Even small nuclear devices can devastate a city. Nuclear weapons are considered weapons of mass destruction, and their use and control has been a major aspect of international policy since their debut.
In the history of warfare, only two nuclear weapons have been detonated offensively, both near the end of World War II. The first was detonated on the morning of 6 August 1945, when the United States dropped a uranium gun-type device code-named "Little Boy" on the Japanese city of Hiroshima. The second was detonated three days later when the United States dropped a plutonium implosion-type device code-named "Fat Man" on the city of Nagasaki, Japan. These bombings resulted in the immediate deaths of around 120,000 people (mostly civilians) from injuries sustained from the explosion and acute radiation sickness, and even more deaths from long-term effects of ionizing radiation. The use of these weapons was and remains controversial. (See atomic bombings of Hiroshima and Nagasaki for a full discussion.)
Since the Hiroshima and Nagasaki bombings, nuclear weapons have been detonated on over two thousand occasions for testing purposes and demonstration purposes. The only countries known to have detonated nuclear weapons—and that acknowledge possessing such weapons—are (chronologically) the United States, the Soviet Union (succeeded as a nuclear power by Russia), the United Kingdom, France, the People's Republic of China, India, Pakistan, and North Korea. Israel is also widely believed to possess nuclear weapons, though it does not acknowledge having them. (For more information on these states' nuclear programs, as well as other states that formerly possessed nuclear weapons or are suspected of seeking nuclear weapons, see list of states with nuclear weapons.)
This text uses material from Wikipedia, licensed under CC BY-SA