Recherche : Articles Audio – podcast Fiches Livres Sites Vidéos retour Veille
Uniquement les Articles
Pour voir les références d’un(e) auteur(e), cliquez sur son nom. Pour revenir à la page, utilisez le bouton refresh ci-dessous.
Cela fonctionne également avec les mot-clés de chaque référence.
Résultats pour:
power
En Bretagne sur plusieurs plages, une association a collecté des milliers de "powerchips green". De quoi s'agit-il exactement ?
EN
In a world built by plutocrats, the powerful are protected while vengeful laws silence their critics
(02/02) - George MonbiotIn the UK and around the world, those who challenge rich corporations are being hounded and crushed with ever-more inventive penalties, says Guardian columnist George Monbiot
Link to climate activism is seven times stronger for anger than it is for hope, say Norwegian researchers
Le groupe d'électrolyseurs américain Plug Power prévoit la construction de trois usines d'hydrogène vert en Finlande, pour décarboner l'industrie tout en s'intégrant dans la "dorsale" européenne en cours de constitution autour de 31 opérateurs de réseaux de transport de gaz du Vieux Continent.
Machine learning is producing impressive results, and, for better or worse, researchers are now using it to address the climate crisis, writes Frederick Hewett.
A coal-fired power plant that had been mothballed has become the first of its kind to be put back on to the network in Germany, as debate rages over how Europe’s largest economy will cope without Russian gas. The facility in Lower Saxony, which is owned by the Czech energy company EGH, has received emergency permission to run until April in an attempt to boost energy production.
Climate change is reducing output and raising safety concerns at nuclear facilities from France to the US. But experts say adapting is possible—and necessary.
An all-electric future depends heavily on copper, and looming supply shortfalls could hamper nations’ goals of reaching net-zero emissions by 2050, according to a new report from S&P Global. Unless significant new supply becomes available, climate goals will be “short-circuited and remain out of reach,” the report says.
After all, Western economies – and their economic growth – depend utterly on labour and resources from the South...
There’s a simple way to unite everyone behind climate justice – and it’s within our power
Coal plants will be reactivated if Russian President Vladimir Putin threatens a gas cutoff, a government official said. That would trigger the second of a three-stage Germany’s gas emergency plan.
Long before the current political divide over climate change, and even before the U.S. Civil War (1861-1865), an American scientist named Eunice Foote documented the underlying cause of today’s climate change crisis. The year was 1856. Foote’s brief scientific paper was the first to describe the extraordinary power of carbon dioxide gas to absorb heat – the driving force of global warming. Carbon dioxide is an odorless, tasteless, transparent gas that forms when people burn fuels, including coal, oil, gasoline and wood.
The cost of decommissioning the UK’s seven ageing nuclear power stations has nearly doubled to £23.5bn and is likely to rise further, the public accounts committee has said. The soaring costs of safely decommissioning the advanced gas-cooled reactors (AGRs), including Dungeness B, Hunterston B and Hinkley B, are being loaded on to the taxpayer, their report said.
Ce plan vise à réduire la dépendance à l’égard des combustibles fossiles russes et accélérer la transition énergétique par une série d’actions suivant 4 axes :
Countries should move from coal to renewable energy without shifting to gas as a “transition” fuel to save money, as high gas prices and market volatility have made the fossil fuel an expensive option, analysis has found. Natural gas has long been touted as a “transition” fuel for economies dependent on coal for their power needs, as it has lower carbon dioxide emissions than coal but requires similar centralised infrastructure, and gas-fired power stations take only a couple of years to build. Earlier this year, before Russia invaded Ukraine, the European Commission angered green campaigners by including gas as a “bridge” to clean energy in its guidebook for green investment.
Le plan « REPowerEU » présenté début mars 2022 par la Commission européenne(1) vise à « rendre l'Europe indépendante des combustibles fossiles russes bien avant 2030 ». Il suppose entre autres « de multiplier au moins par 3 les capacités installées d’énergie solaire photovoltaïque et par 2,5 les capacités éoliennes » au niveau européen, souligne Susanne Nies(2) dans le « briefing » en anglais ci-après, publié le 12 avril par le Centre Énergie & Climat de l'Ifri.
They argue that balancing supply represents just a fraction of nuclear power’s potential contribution to decarbonisation.
When the lights went out at Chornobyl Nuclear Power Plant on 9 March, the Russian soldiers holding Ukrainian workers at gunpoint became the least of Anatolii Nosovskyi’s worries. More urgent was the possibility of a radiation accident at the decommissioned plant. If the plant’s emergency generators ran out of fuel, the ventilators that keep explosive hydrogen gas from building up inside a spent nuclear fuel repository would quit working, says Nosovskyi, director of the Institute for Safety Problems of Nuclear Power Plants (ISPNPP) in Kyiv. So would sensors and automated systems to suppress radioactive dust inside a concrete “sarcophagus” that holds the unsettled remains of Chornobyl’s Unit Four reactor, which melted down in the infamous 1986 accident.
Researchers have been able to cut their carbon footprint by jetting off to fewer international conferences, but physicists working on large-scale experiments may also have to consider the significant environmental impact of the computer power they require. Michael Allen investigates
As head of state-owned oil firm Rosneft, oligarch commands central place in the economy
Russia’s military offensive against Ukraine is an act of aggression that will make already worrisome tensions between Nato and Moscow even more dangerous. The west’s new cold war with Russia has turned hot. Vladimir Putin bears primary responsibility for this latest development, but Nato’s arrogant, tone‐deaf policy toward Russia over the past quarter‐century deserves a large share as well. Analysts committed to a US foreign policy of realism and restraint have warned for more than a quarter‐century that continuing to expand the most powerful military alliance in history toward another major power would not end well. The war in Ukraine provides definitive confirmation that it did not.
Momentum to phase out unabated coal use is growing globally. This transition is critical to meeting the Paris climate goals but can potentially lead to large amounts of stranded assets, especially in regions with newer and growing coal fleets. Here we combine plant-level data with a global integrated assessment model to quantify changes in global stranded asset risks from coal-fired power plants across regions and over time. With new plant proposals, cancellations, and retirements over the past five years, global net committed emissions in 2030 from existing and planned coal plants declined by 3.3 GtCO2 (25%). While these emissions are now roughly in line with initial Nationally Determined Contributions (NDCs) to the Paris Agreement, they remain far off track from longer-term climate goals. Progress made in 2021 towards no new coal can potentially avoid a 24% (503 GW) increase in capacity and a 55% ($520 billion) increase in stranded assets under 1.5 °C. Stranded asset risks fall disproportionately on emergin
L’EPR 2 est un projet de version « optimisée » du réacteur nucléaire EPR – ou réacteur pressurisé européen (initialement european pressurized reactor, renommé evolutionary power reactor) –, voulue plus simple et moins chère à construire que ce dernier.
Later this year, Egyptian engineering firm Arab Contractors is expected to complete the construction of the Julius Nyerere dam on the Rufiji River. Once completed, the $3 billion dam could be Africa’s fourth biggest by power production, producing up to 5920GWH of power annually, enabling Tanzania to close the gap between those with electricity and those who have no access.
In January of 2019, Chase Lochmiller and Cully Cavness, recently reunited prep school pals from Denver, drove out to the snow-covered plains of Wyoming to bring a piece of tech culture to the American heartland. Trembling in -20F (-29C) temperatures, they wired up a prototype of their brainchild: a machine that harnesses the “waste gas” from oil rigs to power mining for cryptocurrency.
Suite à l’occupation du siège Ecolo/Groen, nous avons obtenu une rencontre le 12/10 avec la Ministre du climat Zakia Khattabi. Nos revendications étaient notamment d’obtenir la remise en question de la construction de nouvelles centrales à gaz. la confirmation de la sortie du nucléaire en 2025 et un moratoire sur d'autres projets nuisibles et inutiles.
Le siège d’Écolo/Groen est occupé au lendemain de la manif pour le climat. Une coalition d’associations met ainsi la pression sur les verts pour qu’ils «joignent le geste à la parole». Dans leur viseur: centrales au gaz et aéroports, entre autres.
Leden van het collectief Tegengas bezetten sinds maandagochtend 10 uur de hoofdzetel van Groen en Ecolo in de Van Orleystraat in Brussel. Een dag na de grote klimaatmars vragen de activisten dat de daad bij het woord gevoegd wordt en keren ze zich met name tegen het subsidiemechanisme voor gascentrales.
Leden van het collectief Tegengas bezetten sinds 10 uur de hoofdzetel van Groen en Ecolo in Brussel. Een dag na de grote klimaatmars vragen de activisten dat de daad bij het woord gevoegd wordt. “Meelopen in de klimaatmars betekent kiezen voor een 100 procent duurzame toekomst.”
Depuis 10 heures ce matin, un groupe de 30 activistes climatiques et des membres de collectifs citoyens occupent le siège de Ecolo/Groen à Bruxelles, selon un communiqué. Ces activistes exigent l’annulation du mécanisme de subventionnement des centrales à gaz fossiles et que les deux partis soutiennent pleinement et inconditionnellement la sortie du nucléaire en 2025.
Pour l'organisation People Power Bloc, la présence des deux partis écologistes belges à la marche est insignifiante si des actes concrets ne sont pas posés. C'est pourquoi environ 30 activistes ont décidé d'occuper le siège des deux partis, situé rue Van Orley à Bruxelles, ce lundi matin.
La mise au point est donc claire en ce qui concerne le plan Gaz de la ministre Tinne van der Straeten (Groen), mais également quant à la politique fédérale climat défendue par la ministre Zakia Khattabi (Ecolo).
The U.S. nuclear power regulator last month suspended the shipment of radioactive materials and a hydrogen isotope used in reactors to China's largest state-owned nuclear company, CGN, reflecting Washington's concerns about the country's buildup of atomic weapons.
analysts including Ting Lu warned in a note, predicting China’s economy will shrink this quarter. Article assez incroyable sur les pénuries d'électricité en Chine.
Le géant du cuivre polonais KGHM et l'américain NuScale Power ont signé un mémorandum d'accord sur le développement et la construction, d'ici 2030, d'au moins quatre petits réacteurs nucléaires SMR, une première en Pologne, pays dépendant du charbon pour sa production d'électricité, selon un communiqué jeudi.
On pourrait croire qu’après les alertes accrues des scientifiques quand à l’agenda climatique, cette thématique occuperait une place centrale, sinon pour l’ensemble des forces politiques, au moins pour celle qui donne si souvent des leçons aux autres quand on parle d’environnement.
Global greenhouse gas emissions must peak in the next four years, coal and gas-fired power plants must close in the next decade and lifestyle and behavioural changes will be needed to avoid climate breakdown, according to the leaked draft of a report from the world’s leading authority on climate science.
Lake Oroville’s water level has fallen so low that on Thursday, for the first time since the dam was built in 1967, its power plant was shut down because there is no longer enough water to spin the turbines and generate electricity.Last Friday, hoping to avert any more power shutdowns, Gov. Gavin Newsom issued an emergency order that temporarily waives some air pollution rules to allow natural gas power plants to generate more electricity and pays industries $2 a kilowatt-hour to reduce their electricity use during heat waves.
Deforestation increased faster around newly built roads and dams, as well in areas better connected to consumer markets. Between 1988 and 2004, an average of 20,000km² of forest was cut each year.By the end of the 2000s, the amount of deforestation had substantially declined, reaching its lowest point of 4,571km² in 2012.
the sediments below oxygen-depleted waters are a significant source of nitrous oxide (N2O). This gas is released into the atmosphere when deep water rises to the surface in a process known as upwelling. Nitrous oxide, more commonly known as “laughing gas,” is a potent greenhouse gas, 300 times more powerful than carbon dioxide. Global emissions of N2O are increasing as a result of human activities that stimulate its production.