Fiches info

Under current emission trajectories, temporarily overshooting the Paris global warming limit of 1.5 °C is a distinct possibility. Permanently exceeding this limit would substantially increase the probability of triggering climate tipping elements. Here, we investigate the tipping risks associated with several policy-relevant future emission scenarios, using a stylised Earth system model of four interconnected climate tipping elements. We show that following current policies this century would commit to a 45% tipping risk by 2300 (median, 10–90% range: 23–71%), even if temperatures are brought back to below 1.5 °C. We find that tipping risk by 2300 increases with every additional 0.1 °C of overshoot above 1.5 °C and strongly accelerates for peak warming above 2.0 °C. Achieving and maintaining at least net zero greenhouse gas emissions by 2100 is paramount to minimise tipping risk in the long term. Our results underscore that stringent emission reductions in the current decade are critical for planetary stabili

How the EU is boosting the mining and defence industries in the name of climate action

Van 30 november tot 12 december vindt in Dubai COP28 plaats, de jaarlijkse klimaattop van de Verenigde Naties. Maar waarom is deze klimaattop zo belangrijk? Wie gaat er naartoe? Wat wordt er beslist? Je komt er alles over te weten in onze beknopte gids over de klimaattop. Download hem nu.

L’activité humaine contemporaine émet dans l’atmosphère des gaz à effet de serre en telle quantité que le climat en est modifié. L’humanité doit - nous devons - réduire drastiquement les émissions dès à présent afin de maintenir des conditions favorables à la vie sur Terre. La dépendance de toute notre économie aux énergies fossiles est la principale cause de ces émissions. Pour réaliser des actes aussi fondamentaux que manger, se loger, se vêtir, se déplacer, nous brûlons généralement des combustibles fossiles. Se déplacer en avion est aujourd’hui un moyen très efficace de rejoindre le lointain : ce mode de transport permet un élargissement des horizons. C’est en revanche aussi une des manières les plus efficaces d’émettre une quantité importante de gaz à effet de serre dans un temps court1 . L’usage de l’avion de manière régulière est par ailleurs réservé à une faible part de la population mondiale. Même au sein d’un pays occidental comme la France, la « démocratisation » annoncée n’a pas vraiment eu lieu2

Background Scientists have raised concerns about whether high-income countries, with their high per-capita CO2 emissions, can decarbonise fast enough to meet their obligations under the Paris Agreement if they continue to pursue aggregate economic growth. Over the past decade, some countries have reduced their CO2 emissions while increasing their gross domestic product (absolute decoupling). Politicians and media have hailed this as green growth. In this empirical study, we aimed to assess whether these achievements are consistent with the Paris Agreement, and whether Paris-compliant decoupling is within reach.

Quels objectifs climatiques la France doit-elle adopter pour être sur une trajectoire compatible avec un réchauffement climatique limité à +1,5 °C ?

Comment TotalEnergies utilise les énergies renouvelables pour greenwasher ses projets climaticides

Metals will play a central role in successfully building Europe’s clean technology value chains and meeting the EU’s 2050 climate-neutrality goal. In the wake of supply disruptions from the COVID-19 pandemic and Russia's invasion of Ukraine, Europe’s lack of resilience for its growing metals needs has become a strategic concern. This study evaluates how Europe can fulfil its goal of “achieving resource security” and “reducing strategic dependencies” for its energy transition metals, through a demand, supply, and sustainability assessment of the EU Green Deal and its resource needs . It concludes that Europe has a window of opportunity to lay the foundation for a higher level of strate- gic autonomy and sustainability for its strategic metals through optimised recycling, domestic value chain investment, and more active global sourcing. But firm action is needed soon to avoid bottlenecks for several materials that risk being in global short supply at the end of this decade.

Plug gaps to measure ozone-destroying chemicals and greenhouse gases and verify compliance with Paris and Montreal treaties.

.. l'arithmétique douteuse, les objectifs vagues et les aspirations technologiques souvent irréalisables des plans "zero émission nette” des grands pollueurs. Il analyse les plans d'un certain nombre d'industries polluantes clés, notamment les secteurs de l'énergie, de l'aviation, de la technologie, du commerce de détail, de la finance et de l'agriculture. Des stratégies que ces industries ont déployées pour s'assurer que leur programme "zero émission nette" devienne le principal dogme de la réponse mondiale à la crise climatique.

gnd cnr focusclimat co2 réchauffement climatique urgence ges gaz à effet de serre épidémie coronavirus urgence sanitaire santé,focussanté,économie pandémies crise alimentaire alimentation agriculture resalim

Is it possible to enjoy both economic growth and environmental sustainability? This question is a matter of fierce political debate between green growth and post-growth advocates. Considering what is at stake, a careful assessment to determine whether the scientific foundations behind this decoupling hypothesis are robust or not is needed.

Freshwater availability is changing worldwide. Here we quantify 34 trends in terrestrial water storage observed by the Gravity Recovery and Climate Experiment (GRACE) satellites during 2002–2016 and categorize their drivers as natural interannual variability, unsustainable groundwater consumption, climate change or combinations thereof. Several of these trends had been lacking thorough investigation and attribution, including massive changes in northwestern China and the Okavango Delta. Others are consistent with climate model predictions. This observation-based assessment of how the world’s water landscape is responding to human impacts and climate variations provides a blueprint for evaluating and predicting emerging threats to water and food security. Analysis of 2002–2016 GRACE satellite observations of terrestrial water storage reveals substantial changes in freshwater resources globally, which are driven by natural and anthropogenic climate variability and human activities.

The centerpiece of the early anthropogenic hypothesis is the claim that humans took control of greenhouse-gas trends thousands of years ago because of emissions from early agriculture ( [32] and [33]). A common reaction to this claim is that too few people lived thousands of years ago to have had a major effect on either land use or greenhouse-gas concentrations.