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Current energy projections often envision an expansion of nuclear capacities to decarbonize future energy systems. However, this contrasts with the historic and current status of the nuclear industry, marked by techno-economic challenges for both light-water and non-light-water reactor technologies. Regardless, projections of strong nuclear growth have persisted since the 1970s. This paper investigates the “nuclear energy paradox” which shows the recurring divergence between historical projections and actual developments. A data compilation of long-term energy projections from international organizations such as the IAEA and the IEA as well as energy system models like GCAM and MESSAGE, as used in the IPCC, reveal a recurring pattern of high-growth projections for nuclear power. Such projections often rest on techno-economic assumptions such as substantial cost reductions. We propose the concept of nuclear imaginaries to show that these assumptions are embedded into techno-economic visions of nuclear power de

We infer that 2026 is likely to be the warmest year in the period of instrumental data, based on a physics-based approach with identifiable assumptions. This approach may help us learn something in 2026 about the mechanisms of climate change. The figures in this post and our other current papers will be continually updated on our website,2 when they remain relevant. We are also now on Substack3.

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Au travers de cinq témoignages, 15 ans après la catastrophe de Fukushima, découvrez comment un accident nucléaire majeur est en voie d’effacement, l’Histoire réécrite et la science délibérément niée.

The European Center for Medium Range Weather Forecasts (ECMWF) earlier this year issued a forecast of a strong (“Super”) El Nino to begin later this year and peak in early 2027, as we have discussed in two earlier posts.3,4 El Ninos are important because of the large effects that they have on global weather, even though those effects are not always consistent from one El Nino to another. El Ninos have even greater effect in combination with ongoing global warming, e.g., Radfar et al.5 find that the combination of an El Nino with increasingly prevalent marine heat waves results in tropical cyclones consistently producing higher maximum wind speeds, storm surges, and precipitation rates, and Liu et al.6 describe evidence of El Ninos strengthened control over global climate anomalies in a warmer world

Climate change is causing measurable harm globally1,2. Political and legal efforts seek to link these damages with specific emissions, including in discussions of loss and damage (L&D)3,4; however, no quantitative definition of L&D exists5,6, nor is there a framework to link past and future emissions from specific sources to monetized, location-specific damages. Here we develop such a framework, which is integrated with recent efforts to estimate the social cost of carbon7. Using empirical estimates of the non-linear relationship between temperature and aggregate economic output, we show that future damages from past emissions—one component of L&D—are at least an order of magnitude larger than historical damages from the same emissions. For instance, one tonne of CO2 emitted in 1990 caused US$180 in discounted global damages by 2020 ($40–530) and will cause an additional $1,840 through 2100 ($500–5,700). Thus, settling debts for past damages will not settle debts for past emissions. In other illustrative esti

Les substances per- et polyfluoroalkylées (PFAS) sont au centre de nombreuses préoccupations toxicologiques et environnementales ainsi que de scandales réglementaires depuis deux décennies. Des recherches antérieures ont mis en évidence une longue histoire d’obstruction active, de diversion (« science bending ») et de manipulation réglementaire par les plus grandes entreprises du secteur de l’halogénation, en lien avec l’appauvrissement de la couche d’ozone et la toxicité de certains tensioactifs fluorés (PFOS et PFOA).

The world seems headed into another El Nino, just 3 years after the last one. Such quick return normally would imply, at most, an El Nino of moderate strength, but we suggest that even a moderately strong El Nino may yield record global temperature already in 2026 and still greater temperature in 2027. The extreme warming will be a result mainly of high climate sensitivity and a recent increase of the net global climate forcing, not the result of an exceptional El Nino, per se. We find that the principal drive for global warming acceleration began in about 2015, which implies that 2°C global warming is likely to be reached in the 2030s, not at midcentury.

Aéro Décarbo et le Shift ont le plaisir de publier leurs nouveaux travaux sur l'approvisionnement énergétique du secteur aérien.

Retranscription de la conférence d'Olivier Hamant organisée par le CAL Namur […] Olivier Hamant nous invite à questionner notre quête permanente de contrôle et de performance. A l'heure des bouleversements écologiques, il propose un regard original : et si nous nous inspirons du vivant ? Lent, imparfait et vulnérable, il nous montre qu'une autre manière d'organiser nos sociétés est possible, plus robuste et plus humaine.

Pune série intéressante pour bien comprendre le monde actuel : notre niveau de vie, notre consommation n'est pas magique, mais est rendu possible grâce à une production industrielle mondiale très importante.

Document source : FB Jean-Marc Jancovici Pic de pétrole par Adrien Couzinier – 10/01/2026 Deux éléments ont permis d'éviter un pic mondial de pétrole total depuis 2008 (et donc une crise économique qui ferait passer 1929, 2008 et 2020 pour de la rigolade) : le pétrole de schiste (donc le pétrole US) et le NGL mondial (sous produit liquide de la production de gaz)

On ne peut pas comprendre l'enlèvement de Nicolas Maduro si l'on ignore les masses financières colossales associées à un changement de régime au Venezuela

L’effondrement global arrive par morceaux. L’Allemagne est la première.

We propose a new paradigm, as toxicology currently lacks the proper perspective. From the 1950s to the 1970s, at least one-third of all toxicological testing in the United States, including for chemicals and drugs, was misleading scientists, and this worldwide issue persists today. Moreover, petroleum-based waste and heavy metals have been discovered in pesticide and plasticizer formulations. These contaminations have now reached all forms of life. Widespread exposure to chemical mixtures promotes health and environmental risks. We discovered that pesticides have never undergone long-term testing on mammals in their full commercial formulations by regulatory authorities or the pesticide industry; instead, only their declared active ingredients have been assessed, contrary to environmental law recommendations. The ingredients of these formulations are not fully disclosed, yet the formulations are in general at least 1000 times more toxic at low environmentally relevant doses than the active ingredients alone u

The doughnut-shaped framework of social and planetary boundaries (the ‘Doughnut’) provides a concise visual assessment of progress towards the goal of meeting the needs of all people within the means of the living planet1,2,3. Here we present a renewed Doughnut framework with a revised set of 35 indicators that monitor trends in social deprivation and ecological overshoot over the 2000–2022 period. Although global gross domestic product (GDP) has more than doubled, our median results show a modest achievement in reducing human deprivation that would have to accelerate fivefold to meet the needs of all people by 2030.

Les mesures de soutien public aux combustibles fossiles peuvent encourager la production et l’utilisation de ces combustibles, ce qui augmente les émissions et renchérit le coût de l’atténuation du changement climatique. Ces politiques peuvent aussi fausser les coûts et les prix, générant ainsi des inefficiences dans la production et l’utilisation de l’énergie.

Analysis and forecast to 2030

Purpose Animal emissions account for nearly 60% of total greenhouse gas emissions from the livestock sector. To estimate these emissions, the Food and Agriculture Organization of the United Nations (FAO) developed a dedicated module within the Global Livestock Environmental Assessment Model (GLEAM). Although previous studies have explored selected inputs for specific animals and emission types, a comprehensive analysis of all 92 inputs (parameters and emission factors) had not been conducted. This study aimed to identify the most influential inputs affecting ruminant emissions in GLEAM.

La première étincelle de la rédaction de cette étude a jailli lors d’un atelier organisé par l’UFAPEC intitulé : "Les parents se bougent pour le climat ! "[1] Celui-ci nous a permis de constater que certains parents s’interrogent au sujet de l’éducation aux enjeux climatiques. La lecture de précédentes études sur cette éducation à ces enjeux et leurs constats interpellants[2], que nous verrons plus loin, ont été également des éléments déclencheurs pour nous pousser à approfondir ce sujet. Afin de prolonger le questionnement des parents, nous avons fait le choix d’examiner dans cette étude si, aujourd'hui en 2025, l’éducation aux enjeux climatiques dispensée par l’école secondaire est suffisante et appropriée. Est-elle à la hauteur des enjeux climatiques que nous expliquent les scientifiques ? Quelles sont les perceptions des élèves, des parents et des enseignants à ce sujet ? Quelles sont les aspirations de ces acteurs, dans l’idéal ?