Climate Breakdown Extends Pollen Season in UK and Europe, Study Finds
Climate breakdown has prolonged the pollen season in the United Kingdom and mainland Europe by between one and two weeks since the 1990s, according to a recent study. This extension adds itchy eyes and runny noses to the growing list of harms caused by fossil fuel pollution, highlighting a significant impact on public health beyond more dramatic events like floods and wildfires.
Impact on Allergies and Health
Warm weather and elevated carbon dioxide levels enable plants to produce more pollen, triggering allergic reactions in individuals with hay fever. Symptoms can range from mild irritation to life-threatening conditions. The latest review of climate-health impacts in Europe, published in the Lancet medical journal, found that pollen seasons for birch, alder, and olive trees began one to two weeks earlier in the period 2015-2024 compared to 1991-2000.
Researchers noted that the seasonal severity of birch and alder pollen has increased by 15-20% in regions such as southern UK, northern France, Germany, and eastern Europe since the last report in 2024. Joacim Rocklöv, an environmental epidemiologist at the University of Heidelberg and co-director of the report, emphasized that this represents a "huge" increase in suffering for tens of millions of people. "It's one of those everyday indicators that show something is getting a little worse for a lot of people," he stated.
Broader Climate-Health Trends
The study, compiled by 65 researchers from 46 academic and UN institutions as part of the Lancet Countdown, tracks 43 indicators of climate change and health. Key findings include:
- Heat-related deaths increased by an average of 52 deaths per million people over the study period.
- Daily extreme heat warnings have quadrupled.
- Climate breakdown has facilitated the spread of infectious diseases, with dengue transmission potential more than tripling in recent decades.
- In the past decade, 983 of 1,435 European regions experienced longer periods of "extreme to exceptional" summer drought compared to previous decades.
Separate research has highlighted risks from invasive species like common ragweed, whose pollen is projected to become a widespread health issue across Europe as it expands into new areas. Katharina Bastl, a pollen researcher at the Medical University of Vienna, noted, "Pollen allergies are a health risk of climate change. Global warming has already had an impact on pollination, though it is not that easy to assess and varies regionally."
Urgent Need for Action
The authors underscored the urgent need to adapt to a hotter planet, recommending measures such as greening cities, providing public health guidance for heat-related risks, and redirecting subsidies from fossil fuels to clean energy. Despite these challenges, the report found some positive trends, including a 58% drop in death rates from fine particle pollution from transport in the EU between 2000 and 2022, and an 84% decrease in deaths from electricity generation pollution.
Cathryn Tonne, an environmental epidemiologist at the Barcelona Institute for Global Health and co-director of the report, warned that the "window for action" is narrowing but stressed that Europe still has an opportunity to protect lives. "Redirecting investments from fossil fuels into clean energy, improving air quality, safeguarding vulnerable groups, and preparing health systems for rising climate shocks will deliver immediate and long-term health benefits," she said.
Rocklöv added, "It's a huge change. It shows we can really benefit from the transition away from fossil fuels, and we can do it in a short time." The findings highlight the interconnectedness of climate policy and public health, urging swift action to mitigate further impacts.
