PARIS: Runny nose, itching eyes, worsening asthma symptoms — the effects of hay fever are nothing to sneeze at, experts say, warning of an “explosion” of allergies as climate change lengthens and intensifies pollen seasons.
The UN’s World Meteorological Organization (WMO) has found that a shifting climate has already begun altering the production and distribution of pollen and spores.
As winter frost thaws earlier and spring weather gets warmer, plants and trees flower earlier, extending the pollen season, numerous studies have shown.
Air pollution can also increase people’s sensitivity to allergens, while invasive species are spreading into new regions and causing fresh waves of allergies.
More and more people, particularly in industrialized nations, have reported developing allergy symptoms in recent decades.
Around a quarter of adults in Europe suffer from airborne allergies, including severe asthma, while the proportion among children is 30 to 40 percent.
That figure is expected to rise to half of Europeans by 2050, according to the World Health Organization.
“We’re in crisis because allergies are exploding,” said Severine Fernandez, president of the French Allergists’ Union.
Whereas previously an allergic person would endure only what is commonly known as hay fever, albeit sometimes for years, “now that person can become asthmatic after one or two years,” Fernandez said.

‘No doubt that climate change is having an effect’

Climate change affects allergy patients in multiple ways, according to a 2023 report by the WMO.
Rising levels of carbon dioxide, one of the main heat-trapping gases produced by burning fossil fuels, boost plant growth, in turn increasing pollen production.
Air pollution not only irritates the airways of people exposed, but it also causes stress to plants, which then produce more “allergenic and irritant pollen.”
Nicolas Visez, an aerobiologist at the University of Lille, said each plant species reacted differently to a variety of factors such as water availability, temperature and CO2 concentrations.
Birch trees for example will wither as summers get hotter and drier, while the heat causes a proliferation of ragweed, a highly allergenic invasive plant.
“There’s no doubt that climate change is having an effect,” Visez said.
In a study published in 2017, researchers projected that ragweed allergies would more than double in Europe by 2041-2060 as a result of climate change, raising the number of people affected from 33 million to 77 million.
The authors suggested that higher pollen concentrations as well as longer pollen seasons could make symptoms more severe.

‘AutoPollen’ program
A Europe-wide “AutoPollen” program under development aims to provide real-time data on the distribution of pollen and fungal spores.
In Switzerland, a tie-up with MeteoSwiss allows patients and doctors to match personal allergy profiles with maps of specific allergens throughout the country.
In parts of France, authorities have planted “pollinariums,” gardens packed with the main local allergen species.
These provide information on the very first pollen released into the air so that people can start taking antihistamines and other protective measures in a timely manner.
“Hazelnuts have started to bloom as early as mid-December, which wasn’t the case before,” said Salome Pasquet, a botanist with the association behind the pollen gardens.
“That’s really because we’ve had very mild winters, so flowering has come earlier,” she said.
Some countries are taking an interventionist approach — cutting off the pollen at the source.
In Japan, the government announced a plan in 2023 to combat allergies caused by the archipelago’s many cedar trees, which includes felling cedars to replace them with species that produce less pollen.
Countries in Europe are also more mindful of species in the environment, both native ones that have been planted and invasive newcomers like ragweed.
Preference is given to species with a lower allergenic potential, such as maple or fruit trees.
“The idea is not to stop planting allergenic species,” Pasquet said, but to be mindful of creating diversity and avoiding having “places where there are rows of birch trees, as was the case a few years ago.”
It was birch trees in a client’s garden that originally set off symptoms for Simon Barthelemy, an architect who lives near Paris.
“I had a major eye allergy, and it’s been a recurring problem every year since,” he said.
“I’m on antihistamines, but if I don’t take them I get itchy eyes, I’m very tired, I cough... I can’t sleep at night.”

ROME: European Union budget rules are “stupid and senseless” and need to be changed to allow member states to boost defense spending as recommended by Brussels, Italian Economy Minister Giancarlo Giorgetti said on Thursday.
The EU Commission has introduced flexibility clauses to allow more investment in security, but Giorgetti said their current form penalizes countries such as Italy, which are under a so-called EU infringement procedure for their excessive deficits.
“It is essential to find ways to bring these rules up to date with the crisis we are experiencing so that they do not seem stupid and senseless,” the minister said in a statement issued by his staff on the sidelines of a meeting with euro zone peers in Luxembourg.
The title of the statement was blunter, saying Giorgetti called for changes to “stupid and senseless rules.”
Brussels has proposed allowing member states to raise defense spending by 1.5 percent of gross domestic product each year for four years without any disciplinary steps that would normally kick in once a deficit is more than 3 percent of GDP.
The plan came amid growing pressure in Europe to boost military spending to deter a potential attack from Russia and become less dependent on the United States.
Highly-indebted Italy is set this year to meet the NATO defense target of 2 percent of GDP through a series of accounting changes, but an alliance summit next week is expected to raise the goal to 5 percent of GDP.
Giorgetti said that, under the Commission’s scheme, member states not subject to the EU’s excessive deficit procedure would be allowed to use the extra leeway on defense without breaching budget rules, even if their deficits rise above the 3 percent of GDP ceiling.
However, “member states already in the infringement procedure cannot use the same flexibility,” he added.
In this situation Italy is reluctant to use the EU flexibility clause because it would prevent it from lowering its deficit to 2.8 percent of GDP in 2026 from 3.4 percent last year, as planned.
“Italy is committed to a timely exit from the infringement procedure and accepting the invitation to increase defense spending would forever prevent this,” Giorgetti said.
Rome is also wary of any move that could harm its improving reputation on financial markets, two government officials said.
Last month, credit ratings agency Moody’s upgraded Italy’s outlook to “positive” after rival S&P Global raised the country’s rating to “BBB+” from “BBB.”
Italy’s preferred option would be the issuance of common EU debt to finance higher defense spending, one of the officials said, but such a plan would require support from the other bloc members. (Editing by Alvise Armellini and Gavin Jones)