Valérie Masson-Delmotte

For more than three decades, Brazilian climate scientist Carlos Nobre has warned that deforestation of the Amazon could push this globally important ecosystem past the point of no return. Working first at Brazil’s National Institute for Space Research and more recently at the University of São Paulo, he is a global authority on tropical forests and how they could be restored.

Identifying the socio-economic drivers behind greenhouse gas emissions is crucial to design mitigation policies. Existing studies predominantly analyze short-term CO2 emissions from fossil fuels, neglecting long-term trends and other GHGs. We examine the drivers of all greenhouse gas emissions between 1820–2050 globally and regionally. The Industrial Revolution triggered sustained emission growth worldwide—initially through fossil fuel use in industrialized economies but also as a result of agricultural expansion and deforestation. Globally, technological innovation and energy mix changes prevented 31 (17–42) Gt CO2e emissions over two centuries. Yet these gains were dwarfed by 81 (64–97) Gt CO2e resulting from economic expansion, with regional drivers diverging sharply: population growth dominated in Latin America and Sub-Saharan Africa, while rising affluence was the main driver of emissions elsewhere. Meeting climate targets now requires the carbon intensity of GDP to decline 3 times faster than the global

Une centaine d’organisations nationales et locales de la société civile appellent à une mobilisation le 29 juin pour dire non à la proposition de loi Duplomb qui annihile toutes avancées environnementales.

When a small Swedish town discovered their drinking water contained extremely high levels of Pfas, they had no idea what it would mean for their health and their children’s future

Mark Lynas has spent decades pushing for action on climate emissions but now says nuclear war is even greater threat Climate breakdown is usually held up as the biggest, most urgent threat humans pose to the future of the planet today. But what if there was another, greater, human-made threat that could snuff out not only human civilisation, but practically the entire biosphere, in the blink of an eye?

Recent simulations using the Community Earth System Model (CESM) indicate that a tipping event of the Atlantic Meridional Overturning Circulation (AMOC) would cause Europe to cool by several degrees. This AMOC tipping event was found under constant pre-industrial greenhouse gas forcing, while global warming likely limits this AMOC-induced cooling response. Here, we quantify the European temperature responses under different AMOC regimes and climate change scenarios. A strongly reduced AMOC state and intermediate global warming (C, Representative Concentration Pathway 4.5) has a profound cooling effect on Northwestern Europe with more intense cold extremes. The largest temperature responses are found during the winter months and these responses are strongly influenced by the North Atlantic sea-ice extent. Enhanced North Atlantic storm track activity under an AMOC collapse results in substantially larger day-to-day temperature fluctuations. We conclude that the (far) future European temperatures are dependent o

When people reflect on how their actions shape the future, they are more likely to support solutions to present-day issues like poverty and inequality.

What are the most significant groups in this complex network of our emergent ‘collapse culture’? These groups don’t cohere into a single unified culture that understands itself as singular. Instead, the are thinly connected inside the complex of contemporary culture, a set of linked clusters. Between them, ideas do circulate, but the links between them, as I will return to, are more often established through intermixing in the heads of their proponents, however chaotically this takes place.....

Entre continuité autour de l'actuel président Chan Santokhi, ou retour de la domination du parti de l'ex-président récemment décédé Desi Bouterse, le Suriname va élire ses députés à l'Assemblée qui décidera du nouveau tandem présidentiel de ce petit pays pauvre d'Amérique du sud promis à des lendemains meilleurs grâce au pétrole. Cette ancienne colonie néerlandaise, minée depuis son indépendance en 1975 par des rebellions et coups d'Etat, dispose d'importantes réserves pétrolières off-shore découvertes récemment. Elles devraient offrir au pays, où 20% de la population vit sous le seuil de pauvreté, une importante manne financière à partir de 2028, quand débutera la production.

J’ai l’habitude de voir les écologistes et les futurologues parler des limites de la croissance (« The Limits to Growth »). Je suis moins habitué à voir des spécialistes de l’investissement mentionner des recherches liées aux limites de la croissance. C’est pourtant ce qu’a fait récemment Joachim Klement dans sa lettre d’information quotidienne. Bien entendu, quiconque écrit sur les limites de la croissance doit d’abord procéder à toutes les vérifications d’usage. En effet, la combinaison des mots « limites » et « croissance » dans le titre a suscité un grand nombre de réactions critiques, allant de la déformation pure et simple de l’ouvrage à l’incompréhension du modèle de dynamique des systèmes qui le sous-tend.

I’m used to environmentalists and futurists writing about The Limits to Growth. I’m less used to seeing investment writers mention research that’s linked to The Limits of Growth. But that’s what Joachim Klement did in his daily newsletter recently.

L’eau représente la ressource vitale et la fibre motrice des avancées économiques, technologiques, scientifiques et sociales des systèmes internationaux. La situation critique de pénurie des eaux actuelles met en péril la survie des individus, freine l’épanouissement des nations et annonce un défi complexe pour l’humanité. Le développement économique et la croissance des populations mondiales accentuent les problèmes de stress hydrique. En effet, l’eau est l’indicateur clé des impacts du changement climatique1. La perturbation du cycle de l’eau, la hausse de sa température, les inondations, les sécheresses, et les tempêtes plus fréquentes engendrent des dégradations plausibles de la qualité et la quantité de l’eau.

I’m used to environmentalists and futurists writing about The Limits to Growth. I’m less used to seeing investment writers mention research that’s linked to The Limits of Growth. But that’s what Joachim Klement did in his daily newsletter recently. Of course, anyone who writes about Limits of Growth has to do all the usual disclaimers first. This is because the combination of the words “limits” and “growth” in the title produced a lot of critical responses, on a range from straight-up hatchet jobs which misrepresented the book, to people who didn’t appear to understand the systems dynamics model that sat behind it.

Le nouveau rapport de l’Autorité européenne de sécurité des aliments (EFSA) [1] révèle que 42 % des denrées alimentaires vendues en Europe contiennent des résidus de pesticides, avec des pics particulièrement inquiétants pour certains fruits comme les poires ou les oranges. Plus de la moitié de ces échantillons contiennent plusieurs résidus, mettant en évidence une exposition généralisée de la population européenne à des cocktails de pesticides.

The nation’s top banks are quietly advising their clients on how to build a financial life raft — or perhaps life yacht — from the wreckage of runaway climate change. Make no mistake: The forecasts coming from Wall Street’s leading financial institutions are bleak. But they also point their clients to potential profit-making opportunities from the havoc spreading across the planet, writes Corbin Hiar.

Ce changement, qui survient à la veille de l'audition au Sénat qui devait approuver son ancienne favorite Janette Nesheiwat à ce poste, soulève notamment des questions quant à la possible intervention d'une influenceuse complotiste. Laura Loomer, figure de l'extrême droite américaine, avait déjà fait parler d'elle début avril en obtenant le limogeage du chef de l'agence du renseignement américain, dont elle réclamait la tête auprès du président républicain.

Have you ever thought about what would happen if all life in the ocean disappeared? A recent study explores this extreme scenario to understand how ocean biology shapes the past, present, and future climate. The ocean plays a critical role in regulating Earth's climate. It is a massive carbon store that absorbs about 25% of human-caused emissions and thus helps maintain a relatively low CO2 level in the atmosphere. But what would happen if all marine life—from the tiniest plankton to the largest whales—disappeared? A recent study delves into this extreme scenario to uncover the crucial role that ocean biology plays in mitigating climate change.

Après plus de trois ans de négociations, les pays membres de l'Organisation mondiale de la santé ont approuvé mercredi par consensus un texte historique visant à mieux se préparer et lutter contre les futures pandémies. ions

Morgan Stanley, JPMorgan and an international banking group have quietly concluded that climate change will likely exceed the Paris Agreement’s 2 degree goal.Top Wall Street institutions are preparing for a severe future of global warming that blows past the temperature limits agreed to by more than 190 nations a decade ago, industry documents show.

L'Agence internationale de l'énergie atomique (AIEA) a inspecté lundi la première centrale nucléaire bangladaise, de fabrication russe, qui doit produire ses premiers mégawattheures d'électricité d'ici à la fin de l'année.