Coming-out

Les canicules se répètent. Les articles aussi. Dans les rédactions, une phrase revient, souvent : "on l'a déjà fait". Et si le véritable danger n'était pas seulement le déni climatique, mais l'accoutumance qui conduit peu à peu à ne plus voir, ne plus proposer, ne plus raconter ?

The Trump administration is dismantling a $368 million deep-ocean observation system that was put in place a decade ago to monitor coastal environments, marine ecosystems and powerful currents that affect the global climate.

Alors que les industriels de l’agrochimie pressés de pénétrer le marché européen avec leur nouveau pesticide à ARN interférent n’ont pas attendu l’approbation européenne pour demander en Belgique une dérogation d’urgence, Nature & Progrès Belgique et POLLINIS attaquent cette autorisation devant le Conseil d'État belge. Cette action vise à faire annuler l’autorisation d’urgence du Calantha, un insecticide génétique d’un genre nouveau, dont les risques environnementaux (à long terme) n’ont pas été évalués. Cette procédure constitue un rempart démocratique essentiel contre une décision publique qui fait l’impasse sur la sécurité environnementale.

La pollution aux microplastiques a un effet direct sur le climat. Une étude parue dans Nature montre que les particules qui errent dans l'atmosphère auraient tendance à réchauffer la planète encore plus vite que certains gaz à effet de serre. On en trouve désormais dans les lacs, les océans, les sols, les glaciers de

Le titre Climate Justice Now ressemble à une injonction militante. Son ambition est plus vaste. Il désigne un moment où la question climatique reconfigure des débats plus anciens sur la justice, tout en appelant le monde académique à redéfinir ses modes de production des savoirs. L’ouvrage s’inscrit ainsi à la croisée d’une triple fonction : état des lieux, déplacement intellectuel et injonction à l’action.

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

The Gulf Stream is part of the Atlantic Meridional Overturning Circulation (AMOC). The AMOC is a tipping element and may collapse under changing forcing. However, the role of the Gulf Stream in such a tipping event is unknown. Here, we investigate the link between the AMOC and Gulf Stream using a high-resolution (0. 1°) stand-alone ocean simulation, in which the AMOC collapses under a slowly-increasing freshwater forcing. AMOC weakening gradually shifts the Gulf Stream near Cape Hatteras northward, followed by an abrupt northward displacement of 219 km within 2 years. This rapid shift occurs a few decades before the simulated AMOC collapse. Satellite altimetry shows a significant (1993–2024, p < 0.05) northward Gulf Stream trend near Cape Hatteras, which is also confirmed in subsurface temperature observations (1965–2024, p < 0.01). These findings provide indirect evidence for present-day AMOC weakening and demonstrate that abrupt Gulf Stream shifts can serve as early warning indicator for AMOC tipping.

The new joint policy brief offers a deep dive into the ways in which the social and solidarity economy can advance the objectives of the Roadmap by supporting the eradication of poverty beyond growth.

En sociologue, Camille Peugny analyse le recul des formes de solidarité dans la société actuelle.

In Belem, Brazil’s leader, President Lula da Silva, opened the talks by denouncing obstructionists who “reject scientific evidence and attack institutions.” “They manipulate algorithms, sow hatred and spread fear,” he said, describing a surge in disinformation and propaganda aimed at blocking action to slow climate change. The summit, for the first time, put the issue on the agenda. A coalition of countries and international agencies issued a separate “Declaration on Information Integrity on Climate Change,” calling on governments to address climate disinformation, promote transparency and protect journalists, scientists and environmentalists.