As temperature records are shattered, ice rapidly melts and extreme weather events worsen, many people around the world say they are feeling more worried about climate change.
Researchers call this growing phenomenon “climate anxiety”.
A new analysis examines 94 studies focused on climate anxiety, involving 170,000 people across 27 countries, to explore who it is most likely to affect and what its possible consequences could be.
It finds that those who are more likely to experience climate anxiety include women, young adults, people with “left-wing” views and those expressing “concerns” about nature or the “future”.
Climate anxiety is negatively related to wellbeing, according to the analysis, but positively related to participating in climate action, such as activism and behaviours to reduce emissions.
Below, Carbon Brief explains the findings in more detail.
- What is ‘climate anxiety’?
- Who suffers from climate anxiety?
- What are the consequences of climate anxiety?
- How does climate anxiety differ from general anxiety?
What is ‘climate anxiety’?
“Climate anxiety” can be described and defined in various ways.
The research, published in the journal Global Environmental Change, considers the term “climate change anxiety” to “broadly refer to people’s feelings of anxiety and/or worry related to climate change”.
This is based on two established definitions, explains study lead author Dr Clara Kühner, a researcher of climate change and psychology at the University of Leipzig, Germany. She tells Carbon Brief:
“There is a discussion in the scientific community about what exactly constitutes climate change anxiety.”
The first definition comes from a 2023 research paper, which describes climate anxiety as “persistent anxiety (apprehensiveness) and worry about climate change”.
The second comes from the American Psychological Association, which in 2020 used the term “eco anxiety” to describe “any anxiety or worry about climate change and its effects”.
Kühner explains that “eco anxiety could be interpreted as being more broadly related to the ecological crisis…but [the American Psychological Association] describe it as any anxiety or worry related to climate change”.
Her team noticed that there has been an “increasing amount of research” into climate anxiety over the past few years, she adds:
“Research on the topic has exploded. That’s a signal that it’s very relevant to researchers, but also to society and the public.
“But it was very difficult to get an overview of this research because it was scattered across different disciplines, not only psychology, but also public health and sociology. And so it was difficult to really know how much is out there. That’s when we thought: ‘OK, let’s put all of that together in a quantitative meta-analysis to get an overall perspective on the topic.’”
For the meta-analysis, Kühner and her team searched online records, scoured scientific conference agendas and contacted other scientists to try to identify all published and upcoming studies looking into climate anxiety.
They focused on studies that had conducted surveys with people self-reporting symptoms of climate anxiety. They also restricted their search to “correlational studies” looking at the links between self-reported climate anxiety and various factors, such as gender, age or political beliefs.
In addition, they only included studies involving people over the age of 18.
In total, the meta-analysis identifies 94 climate anxiety studies, involving 170,000 people in 27 countries.
Some 81 of these studies were published after 2020, according to the researchers – reflecting the surge of research interest into the topic over the past few years.
Who suffers from climate anxiety?
As part of the meta-analysis, the researchers looked across the 94 studies to identify what characteristics are most highly associated with having climate anxiety.
From this, the meta-analysis finds that those more likely to report feeling climate anxiety include:
- Younger adults
- Women
- People with a “left-wing” political orientation
- People concerned about the environment
- People concerned about nature
- People concerned about the future
- People who believe in climate change
- People who have been exposed to climate impacts
- People who are regularly exposed to information about climate change (such as climate scientists, journalists and teachers)
The graphic below shows the relative “effect size” of each of these characteristics, according to the study, with -0.9 illustrating the trait is less related to climate anxiety and 0.9 indicating it is more related.
On the graphic, the centre of each blue bar represents the effect size, with the start and end showing 95% confidence intervals.
By contrast, people with the opposite characteristics to those listed above – for example, those that are older, male or hold “right-wing” political views – are less likely to report feeling climate anxiety, according to the research.
The study only examines the correlations between feeling climate anxiety and various human characteristics – and does not look into the reasons why different groups of people may be more likely to experience climate anxiety.
One of the research papers cited in the meta-analysis finds that people under the age of 25 who reported climate anxiety were likely to have feelings of “betrayal” aimed towards older generations and to perceive governmental response to climate change as “inadequate”.
On gender, previous research – not cited in the meta-analysis – has found that women are more likely than men to suffer from mental illness following extreme weather events – and face higher health risks from climate change in general.
The meta-analysis does not look into how being transgender or non-binary could be associated with climate anxiety, but researchers have previously argued that these groups – along with other people who might identify as LGBTQ+ – are likely to face disproportionate climate risks.
The meta-analysis also does not investigate where in the world levels of climate anxiety could be the highest.
Most of the papers included in the meta-analysis were conducted in the global north.
Out of the 94 studies, 56 were conducted in Europe, 12 in North America, seven in Australia and New Zealand, seven in Asia, one in Africa and one in South America. (A further 10 spanned multiple continents.)
This “largely reflects the general dominance of western research in mainstream psychological and behavioural studies” – rather than a weakness of the authors’ methods, says Prof Kim-Pong Tam, an environmental psychologist from the Hong Kong University of Science and Technology, who was not involved in the meta-analysis.
He describes the findings as “very significant”, adding:
“It should be noted that the pattern revealed in this meta-analysis does not necessarily indicate that the phenomenon of interest has rarely been studied in the global south or outside of western societies.
“It is common practice for authors conducting a meta-analysis to focus on publications in the language(s) in which they are proficient. This implies that studies published in non-English languages (usually in local journals), if any, are excluded.”
Dr Charles Ogunbode, an associate professor in psychology specialising in how people respond to environmental change at the University of Nottingham, UK, agrees that the “lack of studies from Africa and other parts of the global south is not a unique weakness of this article”.
He says that the “climate anxiety discourse is western-centric”, explaining:
“Outside of western cultures, climate anxiety may not feel like an especially useful concept for making sense of local lived realities. For example, one study found that feelings of anger and grief regarding climate change are more prominent in Turkey. Another study conducted with young people in three African countries found the predominant emotions to be akin to a helpless pessimism. Similar observations were made in Ecuador.
“It is, of course, valuable to have a comprehensive study on climate anxiety, but the western-centric nature of the concept means that we end up missing out on the nuanced cross-cultural dimensions of emotional responses to climate change.”
What are the consequences of climate anxiety?
As well as examining what human characteristics are most associated with climate anxiety, the meta-analysis explores what consequences are most associated with the phenomenon.
These consequences are grouped into three categories: “wellbeing”, “climate change emotions” and “behaviour”. (The meta-analysis considers “wellbeing” to be “how individuals evaluate the quality of their own lives, including experiences such as life satisfaction”.
The meta-analysis finds that feeling climate anxiety is associated with poor wellbeing and negative feelings about climate change.
However, climate anxiety is also associated with “pro-environmental behaviours”, such as saving energy at home, as well as participating in community activism and showing support for government pro-climate policies. Kühner explains:
“We found that climate change anxiety is a double-edged sword. It [is] related to poorer wellbeing and to more psychological strain. On the other hand, it [is] positively related to different forms of pro-environmental behaviour.
“On the one hand, it could make you feel uncomfortable. But, on the other hand, it may trigger significant action.”
How does climate anxiety differ from general anxiety?
One of the goals of the meta-analysis is to investigate if climate anxiety is a distinct psychological phenomenon – or merely reflects the broader recent trend of rising levels of anxiety across many parts of the world, particularly for younger demographics.
To do this, the researchers carried out a “meta-regression analysis”, a statistical method for, in this case, investigating the size of the impact of various factors on having climate anxiety.
This analysis finds that the characteristics associated with climate anxiety, such as being a young adult or female, as well as its associated consequences, such as taking action to reduce emissions, were “uniquely related to climate anxiety above and beyond generalised anxiety”. Kühner explains:
“From a methodological point of view, this means that these are distinct constructs, not that people who are generally more anxious are also more anxious about climate change.”
This finding could have implications for how both medical professionals and the public view climate anxiety, she continues:
“Sometimes, climate change anxiety is treated like a disease that has to be cured. And it’s not. It’s a normal healthy reaction to an actual threat.
“I think it’s important for policymakers, also journalists and politicians, not to pathologise climate change anxiety, but to interpret it as a functional reaction to something that is actually happening. Instead of offering mental-health support for how to get rid of this, we need more opportunities to channel this anxiety into climate change action.”
In some cases, climate anxiety can cause poor mental health, she adds:
“If [climate anxiety] impairs your daily functioning or affects your sleep, you definitely need mental-health support to cope with these strong emotions.”
In the UK, mental-health support is available from the NHS by calling 111, the charity Mind is also available on 0300 123 3393. In the US, call or text Mental Health America at 988 or chat 988lifeline.org. In Australia, support is available at Beyond Blue on 1300 22 4636, Lifeline on 13 11 14 and at MensLine on 1300 789 978.
The post Explainer: What is ‘climate anxiety’? appeared first on Carbon Brief.
Mining companies are showcasing new technologies which they say could extract more lithium – a key ingredient for electric vehicle (EV) batteries – from South America’s vast, dry salt flats with lower environmental impacts.
But environmentalists question whether the expensive technology is ready to be rolled out at scale, while scientists warn it could worsen the depletion of scarce freshwater resources in the region and say more research is needed.
The “lithium triangle” – an area spanning Argentina, Bolivia and Chile – holds more than half of the world’s known lithium reserves. Here, lithium is found in salty brine beneath the region’s salt flats, which are among some of the driest places on Earth.
Lithium mining in the region has soared, driven by booming demand to manufacture batteries for EVs and large-scale energy storage.
Mining companies drill into the flats and pump the mineral-rich brine to the surface, where it is left under the sun in giant evaporation pools for 18 months until the lithium is concentrated enough to be extracted.
The technique is relatively cheap but requires vast amounts of land and water. More than 90% of the brine’s original water content is lost to evaporation and freshwater is needed at different stages of the process.
One study suggested that the Atacama Salt Flat in Chile is sinking by up to 2 centimetres a year because lithium-rich brine is being pumped at a faster rate than aquifers are being recharged.
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Lithium extraction in the region has led to repeated conflicts with local communities, who fear the impact of the industry on local water supplies and the region’s fragile ecosystem.
The lithium industry’s answer is direct lithium extraction (DLE), a group of technologies that selectively extracts the silvery metal from brine without the need for vast open-air evaporation ponds. DLE, it argues, can reduce both land and water use.
Direct lithium extraction investment is growing
The technology is gaining considerable attention from mining companies, investors and governments as a way to reduce the industry’s environmental impacts while recovering more lithium from brine.
DLE investment is expected to grow at twice the pace of the lithium market at large, according to research firm IDTechX.
There are around a dozen DLE projects at different stages of development across South America. The Chilean government has made it a central pillar of its latest National Lithium Strategy, mandating its use in new mining projects.
Last year, French company Eramet opened Centenario Ratones in northern Argentina, the first plant in the world to attempt to extract lithium solely using DLE.
Eramet’s lithium extraction plant is widely seen as a major test of the technology. “Everyone is on the edge of their seats to see how this progresses,” said Federico Gay, a lithium analyst at Benchmark Mineral Intelligence. “If they prove to be successful, I’m sure more capital will venture into the DLE space,” he said.
More than 70 different technologies are classified as DLE. Brine is still extracted from the salt flats but is separated from the lithium using chemical compounds or sieve-like membranes before being reinjected underground.
DLE techniques have been used commercially since 1996, but only as part of a hybrid model still involving evaporation pools. Of the four plants in production making partial use of DLE, one is in Argentina and three are in China.
Reduced environmental footprint
New-generation DLE technologies have been hailed as “potentially game-changing” for addressing some of the issues of traditional brine extraction.
“DLE could potentially have a transformative impact on lithium production,” the International Lithium Association found in a recent report on the technology.
Firstly, there is no need for evaporation pools – some of which cover an area equivalent to the size of 3,000 football pitches.
“The land impact is minimal, compared to evaporation where it’s huge,” said Gay.
The process is also significantly quicker and increases lithium recovery. Roughly half of the lithium is lost during evaporation, whereas DLE can recover more than 90% of the metal in the brine.
In addition, the brine can be reinjected into the salt flats, although this is a complicated process that needs to be carefully handled to avoid damaging their hydrological balance.
However, Gay said the commissioning of a DLE plant is currently several times more expensive than a traditional lithium brine extraction plant.
“In theory it works, but in practice we only have a few examples,” Gay said. “Most of these companies are promising to break the cost curve and ramp up indefinitely. I think in the next two years it’s time to actually fulfill some of those promises.”
Freshwater concerns
However, concerns over the use of freshwater persist.
Although DLE doesn’t require the evaporation of brine water, it often needs more freshwater to clean or cool equipment.
A 2023 study published in the journal Nature reviewed 57 articles on DLE that analysed freshwater consumption. A quarter of the articles reported significantly higher use of freshwater than conventional lithium brine mining – more than 10 times higher in some cases.
“These volumes of freshwater are not available in the vicinity of [salt flats] and would even pose problems around less-arid geothermal resources,” the study found.
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Dan Corkran, a hydrologist at the University of Massachusetts, recently published research showing that the pumping of freshwater from the salt flats had a much higher impact on local wetland ecosystems than the pumping of salty brine. “The two cannot be considered equivalent in a water footprint calculation,” he said, explaining that doing so would “obscure the true impact” of lithium extraction.
Newer DLE processes are “claiming to require little-to-no freshwater”, he added, but the impact of these technologies is yet to be thoroughly analysed.
Dried-up rivers
Last week, Indigenous communities from across South America held a summit to discuss their concerns over ongoing lithium extraction.
The meeting, organised by the Andean Wetlands Alliance, coincided with the 14th International Lithium Seminar, which brought together industry players and politicians from Argentina and beyond.
Indigenous representatives visited the nearby Hombre Muerto Salt Flat, which has borne the brunt of nearly three decades of lithium extraction. Today, a lithium plant there uses a hybrid approach including DLE and evaporation pools.
Local people say the river “dried up” in the years after the mine opened. Corkran’s study linked a 90% reduction in wetland vegetation to the lithium’s plant freshwater extraction.
Pia Marchegiani, of Argentine environmental NGO FARN, said that while DLE is being promoted by companies as a “better” technique for extraction, freshwater use remained unclear. “There are many open questions,” she said.
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Stronger regulations
Analysts speaking to Climate Home News have also questioned the commercial readiness of the technology.
Eramet was forced to downgrade its production projections at its DLE plant earlier this year, blaming the late commissioning of a crucial component.
Climate Home News asked Eramet for the water footprint of its DLE plant and whether its calculations excluded brine, but it did not respond.
For Eduardo Gigante, an Argentina-based lithium consultant, DLE is a “very promising technology”. But beyond the hype, it is not yet ready for large-scale deployment, he said.
Strong regulations are needed to ensure that the environmental impact of the lithium rush is taken seriously, Gigante added.
In Argentina alone, there are currently 38 proposals for new lithium mines. At least two-thirds are expected to use DLE. “If you extract a lot of water without control, this is a problem,” said Gigante. “You need strong regulations, a strong government in order to control this.”
The post Efforts to green lithium extraction face scrutiny over water use appeared first on Climate Home News.
Efforts to green lithium extraction face scrutiny over water use
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