Flux continu

The ecological concept of human carrying capacity is necessarily complicated because human beings are the ‘ultimate ecosystem engineers’ who moderate the environment for their benefit. For at least the last few hundred years, human ingenuity, access to massive stocks of fossil fuels, and technological development have driven facilitation whereby increasing human abundance has promoted higher population growth rates. However, this positive relationship broke down during the 1950s, and by 1962, the global human population entered a phase where the growth rate consistently declined as population increased. The onset of this negative phase occurred 8 years before a global biocapacity deficit began in 1970. The onset of the negative phase also varies regionally, with the lowest-income and highest fertility regions entering this phase later than higher-income regions. A Ricker logistic model fitted to the negative phase predicts that the global population could reach 11.7–12.4 billion people between 2067 and 2076.

The concepts of Green Growth and Degrowth represent two major narratives in the public and academic debate on socio-ecological transformation. . . Using a comparative analysis of the two research fields, we confirm several findings from previous reviews, including that Green Growth research is highly policy oriented, focuses on practical implementation and builds on empirical research methods, while Degrowth research is highly theory-driven, focuses on the analysis of complex human-nature interrelationships and builds on a sound theoretical and conceptual foundation. Our analysis further reveals that Green Growth and Degrowth are two rather isolated fields of research with little exchange and mutual reference on related topics. However, the topic of social change and transition represents an intersecting and promising future research area. . . .

Le concept de « bien commun », issu de la théologie médiévale, connaît un retour spectaculaire dans les discours politiques, juridiques et intellectuels. Longtemps marginalisée par la pensée moderne, cette notion est aujourd’hui réinvestie par des courants politiques très divers, qui y voient des ressources pour corriger, voire dépasser, les grammaires libérales du politique.

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

Mardi, à l'occasion de la journée mondiale de la santé, la France et l'Indonésie organisent à Lyon le sommet One Health («Une seule santé»). Face aux crises écologiques qui se multiplient, cette nouvelle approche veut concilier la santé des humains, des animaux et de l'environnement. Explications.

Le mot est synonyme de confusion, de désordre, voire de cataclysme. Mais des penseurs invitent à retrouver le sens premier et positif de ce concept qui trouve racine dans la mythologie grecque.

L'autorité de sûreté nucléaire et de radioprotection (ASNR) a demandé à l'exploitant EDF de revoir certains aspects de la conception des ouvrages de génie civil des deux futurs réacteurs EPR2 prévus à Penly, dans un avis du 28 janvier publié vendredi. Le gendarme du nucléaire estime dans son avis, que le dossier d'EDF, même complété "ne permet pas de conclure à la suffisance de la conception et de la démarche de dimensionnement des ouvrages de génie civil retenues par le projet EPR2", pour la paire de réacteurs prévus à Penly (Seine-Maritime). Contacté par l'AFP, EDF a dit prendre "acte" de l'avis, et précisé qu'il "apportera des éléments complémentaires à l'ASNR pour instruction".

S’appuyant sur de nouvelles archives, un chercheur américain montre que la première enquête, passionnante, à la base de cette théorie, publiée en 1956 et devenue un classique de la psychologie sociale, a été manipulée par ses auteurs.

Effective identification and assessment of various energy transition risks are essential for ensuring energy security. This study conducts a systematic review of the literature on energy transition risk assessment, with three principal objectives: ① establishing a standardized risk taxonomy, ② analyzing the characteristics of current assessment methodologies, and ③ identifying the priority research directions. First, energy transition risks are structured into two categories: implementation risks and consequential risks. Subsequently, assessment methodologies are categorized into five methodological groups: the indicator approach, probabilistic risk assessment approach, econometric approach, simulation approach, and hybrid approach.

Pour convaincre les électeurs de droite et du centre d’agir pour protéger la planète, élus et ONG essaient d’adapter le message.