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As the UN gathers, signatories from Bernie Sanders to Yeb Saño issue an open letter calling for clean power for all.
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 battle to feed all of humanity is over,” Stanford biologist and ecologist Paul Erhlich declared on the first page of his 1968 best-seller, “The Population Bomb.” Because the “stork had passed the plow,” he predicted, “hundreds of millions of people are going to starve to death.”
A la hausse constante des prix alimentaires s'ajoutent les effets de plus en plus dramatiques du changement climatique et un monde de plus en plus instable. Serons-nous réellement capables de nourrir une population qui devrait bientôt atteindre 10 milliards. Le professeur Tim Benton, l’un des plus grands experts mondiaux des systèmes alimentaires, estime que notre modèle économique de croissance infinie sur une planète aux ressources finies est voué à s’effondrer. Mais quand cela se produira-t-il ? Qu’est-ce que cela signifie concrètement ? Et enfin, entrons-nous réellement dans une ère de famine ?
Tim Benton, expert reconnu en sécurité alimentaire mondiale, afin de comprendre les causes de l'effondrement de nos systèmes alimentaires et les conditions nécessaires à la construction d'un système véritablement régénérateur. – Pourquoi le système alimentaire actuel est fondamentalement insoutenable – Que signifie concrètement le concept de « limites planétaires » – Le mythe de la croissance verte – Comment nos régimes alimentaires et nos systèmes agricoles doivent évoluer – Les 3 mécanismes qui nous empêchent d'avancer
Global biodiversity loss, ecosystem collapse and national security: a national security assessment
This summer’s extreme weather and wars in Iran and Ukraine have made our need for food stockpiles more pressing than ever
Exclusive: As wildfires rage, Frank Elderson says more work needed to assess risk from collapse of ecosystem services
Exclusive: Global investigation reveals 235 lawsuits have been brought against governments in five countries since 2010
Our roadmap has been shaped by experts across the world, from UN agencies to grassroots movements. We call on political leaders at all levels to use it
How Cynicism Became the New Psychological Performance
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
We work to ensure that carbon pricing and other climate policies cut pollution and drive a just transition towards zero-carbon societies.
Sixty-five million people will die from pollution caused by nuclear energy and weapons programs built before 1989, according to a report published earlier this year by a European scientific committee. The research, from the European Committee on Radiation Risk (ECRR), raises doubts about previous estimates of the risk posed to humans from exposure to radiation from nuclear power and weapons. The study by the ECRR, based on a risk-assessment model developed over the past five years, challenges previous assumptions about the safety of even minimum exposure to low-level radiation.
The Earth is already operating beyond its capacity to sustainably support the global population, according to new research highlighting growing strain on food systems, climate stability, and human well-being. Despite this, researchers say that slowing population growth and increasing global awareness could still help reduce long-term risks.
Researchers in Japan have developed a new material that allows solar cells to generate an amount of energy from sunlight that was previously thought impossible. The discovery, made by a team at Kyushu University, involves a special “spin-flip” emitter that can harvest energy from the Sun that is typically lost as heat. The breakthrough overcomes the long-standing limit of conventional solar cells to achieve an energy conversion efficiency of 130 per cent – opening up new possibilities for ultra-efficient solar panels.
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.
Fears US-Israeli onslaught could lead regime to push for bomb or embolden other groups to steal uranium stockpile
The decline in the health of nature around the world poses a threat to the UK's security and prosperity, an intelligence committee has concluded in a long-awaited report. The document warns of "cascading risks" from the degradation of some of the planet's most important ecosystems, including conflict, migration and increased competition for resources.
As climate and geopolitics shocks bite, countries are rebuilding food buffers. The UK clings to neoliberal ideas while households pay the price
