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Fungi are learning to adapt to climate change, posing a major threat to human health.

Fungal infections range from minor conditions, such as athlete’s foot, to life-threatening respiratory diseases and bloodstream infections.

Fungi are known for their ability to adjust to – and thrive in – new and changing environments.

Now, they are learning to adapt to the rising temperatures, changing rainfall patterns and extreme weather events that characterise a warming planet.

This is increasing their ability to colonise and cause disease in the human body.

However, there is a severe lack of diagnostics, treatments and vaccines available for fungal infections – and fungal resistance to existing drugs is on the rise.

An increase in fungal infections driven by climate change could also have devastating consequences for agriculture, damaging crops and threatening food security.

New fungal pathogens

Fungi are one of five “kingdoms” of life on Earth – putting them in a distinct category separate from animals or plants.

There are millions of fungal species – from saccharomyces cerevisiae, or baker’s yeast, to penicillium chrysogenum, which is the source of the antibiotic penicillin.   

Fungal infections can be transmitted to humans through direct contact in the environment, with contaminated surfaces or via infected individuals.

Historically, most fungi do not cause disease in humans, meaning they are not “pathogenic”.

This is because – unlike viruses and bacteria – most fungi cannot survive or spread in body temperatures of 37C.

But, as global temperatures rise, some fungi are adapting to survive in hotter environments, including the human body.

(How fungi adapt to their environments is still not fully understood. However, their large genomes and diverse metabolic pathways – the chemical reactions which allow organisms to function – are thought to play a key role in their ability to survive and grow in a wide range of conditions.)

An example of this is candida auris, a fungal infection that emerged simultaneously on three continents in the late 2000s. The fungus mostly infects people with weakened immune systems and is a real concern as it can cause bloodstream infections. It is a serious problem in intensive care units, where the fungus sticks to medical equipment and grows rapidly. 

Many infection, prevention and control measures are unable to get rid of it. Candida auris is already resistant to several antifungal drugs, making it very challenging to treat. One study in Oman, for example, recorded a fatality rate over more than 50%.

Due to lack of surveillance and routine monitoring, we do not know exactly how many people are impacted by candida auris infections.

To address this, the World Health Organization Global Antimicrobial Resistance and Use Surveillance System (WHO-GLASS) – a programme that provides a standardised approach to collect and analyse data for antimicrobial resistance surveillance – has included a protocol for candida auris

Candida auris is one of four fungal species identified by the World Health Organization (WHO) as a “critical” threat to public health, alongside aspergillus fumigatus, candida albicans and cryptococcus neoformans

Scientists have pointed to the likelihood that the emergence of candida auris is being driven by rising temperatures caused by climate change. 

A 2022 study noted that higher temperatures driven by human-caused climate change may have added “selective pressure” on candida auris – leading to the spread of strains “adapted to salinity and higher temperatures – similar to the conditions found in the human body”.

The emergence of candida auris is just one example of how climate change is exacerbating fungal infection.

A study currently undergoing peer review suggests that – without effective strategies to tackle climate change – the aspergillus family could expand its reach to more northerly swathes of Europe, Asia and the Americas, exposing more people to life-threatening respiratory infections as temperatures rise.  

Aspergillus infections can cause permanent damage to lungs and lead to serious illness in individuals with existing respiratory conditions or weakened immune systems.

Extreme weather

Rising temperatures are not the only cause of rising fungal infections linked to climate change.

Changing rainfall patterns, increasing humidity and worsening extreme weather events are also driving fungal pathogens to new areas. 

Heavy rainfall, flooding and humidity leads to increased moisture in homes, increasing the growth of indoor mould. Mould – which encompasses a diverse group of fungal species – can cause substantial health impacts when inhaled for those with underlying health conditions, such as asthma. 

Meanwhile, extreme weather events, such as wildfires and floods, transport fungal pathogens to new regions by spreading spores far beyond where they would typically be found. This increases the threat fungi pose to both human health and agriculture.

For instance, the fungus coccidioides, which is found in soils in the south-western US and parts of central and South America, causes valley fever – a lung infection which can be fatal to humans and animals. 

Outbreaks occur when extreme events, such as wildfires, disturb large amounts of soil and spread fungal spores into the air. These enter the human body when inhaled. Cases are often unreported, but it is estimated that the fungi causes around 206,000-360,000 cases per year in the US. 

The fungus thrives in a hot and dry climate. Coccidioides is now being seen in regions that would not normally support its growth, as the climate heats up.  

A 2019 study used climate models to project that the range of valley fever could expand into more northerly US states such as Idaho, Wyoming and Nebraska. It also estimates that, by 2100, cases across the US could rise by approximately 50% as more regions develop climates suitable for transmission.

Threatening food security

Fungal pathogens also threaten human health indirectly by damaging harvests and causing a range of plant diseases, including blights, root rot and mildew.

Blight tomato disease.
Blight tomato disease. Credit: Botany vision / Alamy Stock Photo

Fungi are a key part of soil ecosystems, but plant pathogenic fungi can cause growers to lose between 10-23% of their crops every year – and a further 10-20% after they are harvested, as food that is incorrectly stored goes mouldy at different points of the supply chain.

Rising temperatures can spread and introduce more pathogens to an area, which can reduce harvests and, in some cases, wipe out entire crop families. This could result in food insecurity globally and economic instability in regions that rely on agricultural exports. 

Modern agriculture’s reliance on growing genetically uniform crops, known as monocultures, puts the global food system at increased risk of fungal disease, as pathogens learn how to colonise crops.

Developments in the global banana market are a prominent example of the threat posed by fungus to crops. In the 1950s, the Gros Michel banana – once the main export variety of banana – was wiped out by a disease caused by the fungus fusarium oxysporum.

Now, the banana variety that was grown and exported in its place – the Cavendish banana – is under threat by a new strain of fusarium. This poses a major threat to the global banana trade, given that the Cavendish banana accounts for 47% of banana production and virtually all bananas supplied to the US and Europe.

In another example, the fusarium graminearum fungus, which flourishes in wet conditions and warm temperatures, causes a disease that is thought to cause wheat and barley yield losses amounting to more than $1bn every year.

Rising antifungal resistance

The spread of fungal infections caused by climate change is particularly concerning given the lack of available treatment options, as well as limited awareness among the public and healthcare professionals.

Most healthcare professionals receive little training around how to identify fungal infections, leading to delayed diagnosis and treatment. In the developing world, fungal infections can be deadly because both awareness and access to diagnostic tests are lacking.

There are just four types of antifungal drugs and no approved fungal vaccines.

Antifungal treatments are harder to develop than antibiotics because fungi are more biologically similar to humans than plants – making them difficult to kill without harming human cells.

Meanwhile, resistance to the antifungal drugs that are available is growing.                                                                                           

The fungicides used to kill fungi in agriculture often share “modes of action” with medical antifungals. The overuse of these fungicides has led to fungi in the environment building up their resistance – creating hardier fungi that are more difficult to treat in clinical settings. 

As climate change puts additional stress on the food system, the risks and benefits of using fungicides to ensure food security need to be balanced with safeguarding the effectiveness of antifungal drugs.

However, there is limited communication between agricultural and medical sectors around how to juggle these priorities.  

And yet – despite all these challenges – fungal infections receive a fraction of the funding and attention that bacterial or viral diseases do. 

Fungi that tackle climate change

Fungi have historically been an asset in medical research – most notably the discovery of the drug penicillin. They could also prove valuable in the fight against climate change.

Some fungi are used to suppress populations of pests or pathogens in agriculture. This method – known as natural biocontrol – uses fungi, or other forms of naturally occurring organisms – such as bacteria, insects or viruses – as a replacement for chemical pesticides.

Natural biocontrol is seen as a more environmentally friendly method for treating crops than manmade chemicals because the organisms break down naturally in the environment and do not leave toxic residues in the soil

Meanwhile, researchers have also found that mycorrhizal fungi – which grow in association with plant roots – store roughly 13bn tonnes of carbon (GtC) – equivalent to 36% of annual  global fossil fuel emissions. The fungus does this by absorbing carbon from plants and locking it in their underground networks and soil, where it stays stable for long periods. 

There are groups looking at how the mycorrhizal fungi could be harnessed to help deliver decarbonisation – similar to tree planting. 

However, more research is needed to better understand the valuable properties of fungi, including how they could be part of “nature-based solutions” to help tackle climate change.

Discovering the unknown

There is still a lot that remains unknown about fungi. Scientists estimate that less than 10% of all species have been identified globally.

Fungi are essential to healthy ecosystems. They recycle nutrients by breaking down organic matter and play a critical role in the carbon cycle.

But climate change is disrupting this balance. Rising temperatures and environmental shifts threaten to wipe out some fungal species before they’re even discovered, while enabling others to thrive in new – and often harmful – ways. 

These changes signal deep trouble for the natural world.

It is, therefore, critical that more scientific attention is paid to the risks and opportunities of fungi as they learn to adapt to a warmer climate. 

The post Guest post: Fungal infections are adapting to climate change – and threatening public health appeared first on Carbon Brief.

Guest post: Fungal infections are adapting to climate change – and threatening public health

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Climate Change

Self-taught mechanics give second life to Jordan’s glut of spent EV batteries

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In the basement of a middle-class home in Jordan’s capital, a homemade energy storage system connects 20 reconditioned Tesla car battery modules to rooftop solar panels, meeting nearly all of the family’s electricity needs and keeping their lights on during power cuts.

“I installed this on my own, although I haven’t formally trained as an engineer. It’s really a hobby,” said the owner of the house, a middle-aged communications professional who asked not to be named.

“It’s cut my electricity bill to a small fraction of what it was,” he said, gesturing towards the stack of modules and inverters.

He bought the batteries from an auto repair shop in Amman that specialises in repairing and reconditioning Tesla batteries – a growing trade in Jordan, where electric vehicles (EVs) now account for more than half of total vehicle imports, according to data from the US International Trade Association.

Jordan’s transport sector accounts for more than a quarter of the country’s greenhouse gas emissions, making it a focus of the government’s climate strategy, which seeks to cut emissions 31% by 2030.

But as climate-friendly tax breaks boost sales and help Jordan emerge as an EV leader in the Middle East, the country now faces a looming wave of end-of-life batteries and a lack of formal infrastructure to deal with them.

That is where people like auto repair shop owner Shadi Jameel are stepping in with an entrepreneurial solution.

Reconditioned Tesla car battery modules are used as an energy storage system in a home in Amman, Jordan (Photo: Yamuna Matheswaran)

New life for end-of-life batteries

Besides undertaking battery repair and maintenance in cars, Jameel’s workshop, located in Amman’s Al Bayader industrial area, also sells refurbished batteries to customers for usage in second-life applications such as mobile and stationary energy storage systems, like that installed by the homeowner in his basement.

“We work exclusively with Tesla batteries,” Jameel said, smoking a cigarette as he surveyed the bustling workshop. “We extend battery life and fix issues such as disconnection between modules and cells,” he said.

With about 150,000 EVs on Jordan’s roads this year, and sales forecast to keep growing in the years ahead, Jameel has plenty of supplies.

By 2035, Jordan will have nearly 200,000 depleted high-voltage lithium batteries from EVs alone, according to the Circularity Hub (C-Hub) for Spent EV Batteries. C-Hub was established in 2024 by the German Jordanian University with governmental support to study the issue and shape policies that will enable sustainable management of spent EV batteries and lead to economic growth.

In the meantime, however, there are no formal channels for depleted EV batteries to be recycled or reconditioned in the country of roughly 11 million people – leading to the involvement of a growing informal sector.

In the absence of formal training programmes in the country, many mechanics have taught themselves how to repair and recondition batteries.

“I learned from online videos and by talking to people in other countries that I work with,” Jameel said.

Tesla cars parked in front of a closed shop with a yellow container on its roof that reads "Shadi"
Tesla cars parked in front of Shadi Jameel’s auto repair shop in Amman, Jordan (Photo: Shadi Jameel)

Safety worries

EV batteries that are classed as end-of-life may still retain up to 80% of their original capacity, according to the International Energy Agency, which means they can still be used in second-life applications, such as household energy storage.

“I’ve seen and heard of spent batteries being hooked up to solar systems or other local power setups, often at family farms or vacation homes in semi-remote areas,” said Fadwa Dababneh, C-Hub’s director.

As well as saving money on bills and reducing battery waste, using spent batteries for energy storage stabilises the electricity grid as Jordan aims to get half of its power from renewables by 2030, up from 29% today.

    But the current informal nature of most battery reconditioning raises safety concerns, Dababneh said.

    “These setups are typically done by freelancers or hobbyists rather than specialists or businesses formally working in this space,” Dababneh said. “Because they’re informal, there’s limited visibility on how widespread or safe these practices are.”

    Two battery-related explosions this year, one in a repair shop and the other during the transportation of a used battery, have spotlighted these risks. While no one was hurt, the explosions have spurred the Environment Ministry to focus on the looming spent-battery crisis.

    Graph showing the number of expected end-of-life batteries in Jordan between 2025 and 2035

    Prolonging battery life

    At the moment, depleted batteries are exported for recycling – mainly to China and Germany, said Mahmoud Zboon, head of the ministry’s Hazardous Waste Department. Otherwise, they can be sent to the sole hazardous waste landfill in the country, where they are held indefinitely.

    In practice, many end up in regular landfills, posing environmental and health risks, including the leakage of toxic heavy metals into the soil and groundwater.

    Ali Al-Zyoud, chief technology officer at ExelX, a company specialising in battery-regenerative technology, wants to change that.

    “There is a lot of potential here in Jordan when it comes to lithium-ion batteries,” he said.

    Headquartered in the UAE, ExelX’s centre in Amman works with Japan-based Battery Bank Systems and uses its technology for the diagnosis, charging, and maintenance of different types of batteries.

    The technology prevents battery deterioration, restores cell balance and prolongs battery life.

    A man rolls a long battery on a trolley in a workshop
    Workers at the ExelX centre, a company specialising in battery regenerative technology, in Amman, Jordan (Photo: Yamuna Matheswaran)

    Private sector challenges

    According to Al-Zyoud, ExelX has extended the lifecycle of more than 500 Tesla batteries over the past three years.

    “Battery replacement is expensive. A regenerated battery only costs 20% of the price of a new one. So this also offers financial benefits to EV owners,” he said, adding that Jordan urgently needs training programmes and collection centres to ensure safe battery storage and prevent dangerous disposal.

    Zboon, the government official, said the private sector has been attempting to invest in the establishment of collection centres. But hefty initial investment needs and lack of standardisation in battery technology were challenges.

    A strategic brief recently released by C-Hub proposed a robust battery-tracking and traceability system, saying that would enable formal private sector investment to capture value from the battery lifecycle.

    Informal workshops should also be regulated and financial incentives would encourage that, Dababneh said.

    “Bringing informal repair shops into the formal system would be very beneficial, particularly in terms of ensuring safety and quality,” she said.

    The post Self-taught mechanics give second life to Jordan’s glut of spent EV batteries appeared first on Climate Home News.

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    For Indian women workers, a just transition means surviving climate impacts with dignity

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    For the Self-Employed Women’s Association (SEWA), just transition begins not just with carbon, but with resilience – the daily struggle of poor women to withstand the heatwaves, floods and crop failures already battering their lives. Climate shocks that are stripping poor women not only of income, but of dignity.

    Representing 3.2 million informal workers across 18 states – street vendors, waste pickers, construction labourers, home-based producers and small farmers – SEWA has spent more than five decades fighting for rights and recognition.

    “This is what ‘just transition’ must mean for us,” says Mansi Shah, senior coordinator at SEWA. “It is not only about future green jobs or phasing out polluting industries. For women workers on the frontlines, it is about surviving heatwaves, floods and crop failures today – and doing so with dignity.”

      SEWA’s own surveys underline the urgency. More than 90% of women workers report livelihood losses from climate shocks, while 74% say their children’s education has been disrupted. Over 80% of households face water insecurity, 62% food insecurity, and nearly 40% report mental health impacts.

      “When people talk about adaptation or resilience, it sounds abstract,” Shah says. “For our members, it means the difference between feeding your children and selling your dignity.”

      “On one side, hungry children. On the other, her respect”

      One member – a smallholder farmer – told SEWA organisers what happened when a prolonged heatwave dried her fields and wiped out any possible work as an agricultural labourer. With children to feed and no savings, she went to a local moneylender.

      The terms were brutal: extortionate interest and demands for sexual favours.

      “She had to choose between her children’s hunger and her own respect,” Shah says. “That is the kind of choice no woman should ever face. But climate change is forcing it every day.”

      By chance, the woman had been enrolled in SEWA’s pilot parametric heat insurance scheme – designed to trigger automatic payouts when temperatures cross preset thresholds, providing fast, predictable relief when heat destroys livelihoods. On the very day she faced the moneylender, the insurance activated and 1,800 rupees (about $20) landed in her account – enough to buy food for two weeks, enough to walk away.

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      Women-led solutions prove just transition works

      For Meenaben, a SEWA smallholder in Kutch district, the blow came from unseasonal rain and hail. Her 1.5-acre rain-fed millet crop, almost ready for harvest – and crucial fodder for her cattle – was shredded overnight.

      “Government relief can take months to reach a village,” Shah explains. “So women like Meenaben are pushed toward debt – often predatory – just to survive the gap.”

      SEWA’s answer is speed and self-help. Through its Livelihood Recovery & Resilience Fund (LRRF) – a blended pool seeded by one day’s wage per member per month, matched by philanthropy – women can access rapid loans within 14 days of a climate shock, long before state compensation arrives. The fund kept Meenaben’s household afloat, paid for inputs for the next sowing, and avoided a spiral into debt.

      “We can’t wait for others to save us,” says Shah. “So SEWA women build their own safety nets – and get back to work.”

      Mansi Shah, senior coordinator at SEWA, says informal women workers want to survive climate shocks with their dignity intact.

      Mansi Shah, senior coordinator at SEWA, says informal women workers want to survive climate shocks with their dignity intact.

      From Gujarat to the Global South

      After piloting its member-owned LRRF a decade ago, SEWA shared its results at a global women leaders’ meeting in 2023 with Secretary Hillary Clinton, Ambassador Melanne Verveer and women’s organisations from Africa and Latin America. The message was clear: women workers across the Global South face the same shocks and the same finance gap.

      On the strength of that model, SEWA partnered with the Clinton Global Initiative to launch the Global Climate Resilience Facility (GCRF) in February 2024. Its framework is complete and fundraising is underway. Once capitalised, it will support frontline women’s organisations to run LRRF-style funds, expand parametric insurance, and scale women-led adaptation and clean-energy solutions across the Global South.

      From rural daughter to solar entrepreneur

      If these stories show the cost of climate shocks, Payalben Munjpura’s shows what investment unlocks.

      Payalben grew up in a village of 250 households in Surendranagar district. Her father was an electrician. Like most rural daughters, she was expected to stay indoors – until SEWA persuaded her parents to let her train as a solar PV technician.

      She completed a three-month course and certification, then formed a team of four. Drawing on her father’s skills, she brought him into the enterprise, saving costs and rooting the work in local expertise. Together, they now install rooftop solar systems in nearby villages through India’s new PM Surya Ghar scheme, which offers households subsidies covering up to 60% of installation costs.

      Her income has transformed the family: she helped reclaim their mortgaged farm, paid for her younger brother’s education, and rebuilt their home.

      “Women are always seen as energy users,” Shah says. “Payalben shows they can be owners, managers and distributors. If skills are brought to their doorstep, women will turn the climate crisis into opportunity.”

      The women-led solutions already in motion

      SEWA’s members are not waiting for policy promises – they are already building resilience from the ground up. Through its Building Cleaner Skies campaign, SEWA links local experience with a broader strategy of women-led adaptation.

      Its Climate School turns climate science into simple visual lessons, training grassroots leaders as climate educators. Its Green Villages initiatives bring clean cooking, biogas, drip irrigation and rooftop solar – all managed by women handling finance, vendors and repairs.

      Brazil’s environment minister urges heads of state to address fossil fuels at COP30

      The movement also nurtures young women climate entrepreneurs who deliver adaptation technologies and green livelihoods. And when shocks hit, SEWA’s insurance and finance schemes move faster than the state, trigger quick payouts and provide loans within 14 days.

      “These are not abstract pilots,” says Shah. “They are working now, in villages across Gujarat. The problem is not solutions. The problem is finance.”

      Lessons for COP30

      A just transition must also confront the realities of climate impacts. For informal women workers, it is not about distant promises of green jobs, but about surviving the effects of warming now – and building social protection systems that can secure their livelihoods.

      SEWA’s experience shows that women-led action works. From grassroots insurance schemes to rooftop solar enterprises, women are already designing and scaling climate solutions that protect both their income and dignity.

      To take these efforts further, finance for just transition policies must be deployed – and made accessible to women on the frontlines. The Belém Action Mechanism (BAM) for a Global Just Transition – proposed by civil society as a key deliverable for COP30 – could help bridge that gap by aligning governments, international institutions and community movements, creating clearer pathways for funding and technical support to reach grassroots initiatives directly.

      But whatever happens in Belém this November, for millions of women like SEWA’s members, the transition has already begun.

      The post For Indian women workers, a just transition means surviving climate impacts with dignity appeared first on Climate Home News.

      For Indian women workers, a just transition means surviving climate impacts with dignity

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      What the Whales Are Saying

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      Go behind the scenes with executive editor Vernon Loeb and reporter Katie Surma as they discuss how scientists are using AI to understand sperm whale communications, a discovery that could upend the way we interact with them.

      What separates humans from other species? The answer to that question may no longer be language.

      What the Whales Are Saying

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