Flux continu

There is mounting experimental evidence that lifetime exposure to increasing atmospheric CO2 levels can negatively impact the normal physiology of organisms. Directly assessing this in humans is very difficult. We analysed serum bicarbonate (HCO3−), calcium (Ca) and phosphorus (P) from 1999 to 2020 as indirect proxies for atmospheric CO2 exposure. Over this period, average bicarbonate levels in this population show an increasing trend which parallels rising atmospheric CO2 concentrations. Both. If these trends continue, blood bicarbonate values could be at the limit of the accepted healthy range in half a century, and Ca and P will be at the limit of their healthy ranges by the end of this century. This has the potential to cause a range of adverse health effects.

Anthropogenic activities are increasing the amount of carbon dioxide (CO2) in the atmosphere. There is mounting experimental evidence that lifetime exposure to these increasing atmospheric CO2 levels can negatively impact the normal physiology of organisms. However, directly assessing this in humans is very difficult. We analysed serum bicarbonate (HCO3−), calcium (Ca) and phosphorus (P) levels from the U.S. National Health and Nutrition Examination Survey (NHANES) from 1999 to 2020 as indirect proxies for atmospheric CO2 exposure. Over this period, average bicarbonate levels in this population show an increasing trend which parallels rising atmospheric CO2 concentrations. Both Ca and Phave decreased steadily over the same period. If these trends continue, blood bicarbonate values could be at the limit of the accepted healthy range in half a century, and Ca and P will be at the limit of their healthy ranges by the end of this century. Studies indicate that, after this time, elevated atmospheric carbon dioxide

En 2025, un groupe de scientifiques a détecté un nuage de lithium dans le ciel européen, qui s’explique par le retour vers la Terre du deuxième étage d’une fusée SpaceX.

Today, we are close to the critical moment when conventional economic growth becomes impossible on a finite planet, constrained by two parallel factors: resource depletion and pollution. Tthe depletion of fossil fuels and other mineral commodities is placing heavy constraints on both industrial and agricultural production. We are not running out of anything yet, but the cost of extraction is increasing, just as the damage that extraction causes to the ecosystem. On the other side, pollution is appearing in more than one form. Chemical pollution is growing in terms of heavy metals, endocrine-disruptors, and other poisoning substances, while climate change can be seen as another form of pollution generated by the excess of CO2 in the atmosphere.

Les négociations ont pris fin. De nouvelles sont prévues la semaine prochaine.

We already have plenty of evidence of what happens when things better left to governments — which in this case might decide to never flip the switch at all — are ceded to private industry.

Les niveaux de dioxyde de carbone (CO₂) dans l'atmosphère ont augmenté d’un montant record en 2024, atteignant de nouveaux sommets et provoquant un réchauffement à long terme supplémentaire et des conditions météorologiques extrêmes, selon l’Organisation météorologique mondiale (OMM).

L’année 2024 vient de marquer un tournant climatique que les scientifiques redoutaient depuis des décennies. Pour la première fois depuis le début des enregistrements, le dioxyde de carbone a atteint un niveau record qui ne laisse aucune place au doute : notre planète s’engage vers un réchauffement dont les effets se feront sentir pendant des siècles. Ce n’est pas une hypothèse, c’est un constat établi par l’Organisation météorologique mondiale.

La concentration de dioxyde de carbone (CO2) dans l'atmosphère a connu l’an dernier sa plus forte hausse depuis 1957, a alerté mercredi l’Organisation météorologique des Nations unies (OMM). En cause, l’augmentation continue des émissions de gaz à effet de serre d’origine humaine, qui affaiblit la capacité des forêts et des océans à absorber le carbone.

Les concentrations de dioxyde de carbone ont connu leur plus forte hausse depuis 1957, a averti mercredi l’organisation météorologique des Nations unies. En cause, la hausse persistante des émissions d’origine humaine et la multiplication des feux de forêt.