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Is it because of climate change?

Is it because of climate change?

 


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Scientists have long known that as climate change warms the planet, plants produce more pollen, making allergic seasons longer and more prominent.

Now, according to a new study, patients with hay fever are getting more and more attention.

In a poll of more than 2,000 U.S. adults jointly conducted by Harris Poll HealthDayOnly one in three reported having been officially diagnosed with hay fever by a doctor, but three in four said they experienced seasonality. Symptoms.

For most of these individuals, seasonal sneezing is not a walk in the park. 74% say their symptoms have a negative impact on their overall quality of life. And according to Kathy Steinberg “Other points in the investigation suggest that the situation will only get worse,” Harris Paul said.

As part of the survey, these 1,500 or so allergic respondents agree or disagree with a list of statements such as “Seasonal allergies feel worse each year.” I evaluated it. “My seasonal allergic symptoms began early in the season in recent years.” “I am now experiencing seasonal allergic symptoms all year round.”

In response to these statements, the participants were split. Almost half strongly or to some extent agreed with the statement, while others strongly or to some extent disagreed.

“For many, their symptoms are getting worse each year, or happening all year round, or they start earlier in the season than in recent years,” Steinberg said.

As global warming progresses, the tendency for pollen seasons to become longer and more intense can become more and more unmistakable for affected people.

“People who are saying [their allergies] Seems to be getting worse, they may have more problems based very well What we have Pollen will increase. ” HealthDay Now interview. Fineman is an Allergist at Atlanta Allergy & Asthma and a former President of the American College of Allergy, Asthma and Immunology.

“If we continue to have as many warming trends as we have, we will probably get higher and higher. The season starts early. “

In a recent study, researchers modeled future pollen emissions and concluded that total pollen emissions could increase by up to 40% by 2100. They expect the spring pollen season to begin 10-40 days ago and the autumn seasonal allergies to continue. It can be up to 19 days longer.

These escalations add to the existing increase in pollen production that began decades ago. As of 2018, pollen counts are already 20% higher than in 1990, according to another study.

Higher temperature, larger flowers

Climate change has a double impact on pollen counts — According to William Andereg, an associate professor of biology at the University of Utah, increased carbon dioxide emissions are both drivers of pollen production.

“Connecting science Incredibly clear in the longer and more severe pollen season. Plants tend to produce more pollen as the temperature rises and the amount of CO2 in the atmosphere increases. “Plants tend to grow larger and produce more pollen per plant.”

These by-products of human activity also shorten winters and prolong the growing season in spring and autumn. The longer growing season gives the plant more time to produce more pollen.

Feynman and his Atlanta practice Tracked daily pollen levels Over 40 years in this area. In 2021, they used this data study It shows that pollen emissions from oak trees have increased by 5% each year over the last 27 years.

Feynman said he usually advises patients to start taking allergic medications two weeks before the pollen season begins. And that date came earlier and earlier over the years, in line with the extension of the pollen season.

For many years it was St. Patrick’s Day. Next was Valentine’s Day. And in the last two years, pollen counts in the Atlanta area have reached their highest levels, forcing patients to be notified before and after Groundhog Day.

These changes can confuse long-standing allergic patients who are accustomed to breaking down antihistamines or starting their first immunotherapy at a predictable time each year. Allergy treatment is generally most effective when started before symptoms.

When the patient isn’t ready, “that’s when things can really get worse,” Anderegg said. “And this is often heard by allergists. Patients are surprised because the pollen season begins much earlier.”

The current trajectory of seasonal allergies has meaningful consequences for public health and well-being.while 10% and 30% The proportion of the world’s population is affected by hay fever, and the prevalence is rising. For many, this condition is a significant burden with many consequences.For example, more than 70% of allergic patients HealthDay/ According to Harris Poll’s research, their symptoms affect their ability to spend a peaceful night.

The consequences of seasonal allergies and increased pollen counts are also indirectly felt.

“There is a fairly wide range of literature related to economic productivity, how well workers can do their jobs, and children,” Anderegg explained. “When children are also suffering, it’s really hard for them to learn and succeed at school.”

Another Economic Impact-Pollen-related health care costs more than $ 3 billion annually. Centers for Disease Control and Prevention..

As the pollen season worsens and lengthens, millions of people are directly experiencing the effects of climate change. Given the prevalence of seasonal allergies, this trend offers opportunities.

“There are really big benefits to being proactive and urgent about climate change,” Anderegg said. “You can avoid about half of the increase Working on climate change can make things worse and even worse. ”


Why does pollen make you miserable?Here are some tips and why it causes allergies


For more information:
Centers for Disease Control and Prevention More about seasonal allergies and climate change.

Yingxiao Zhang et al, Predicted Climate-induced Changes in Length and Size of Pollen Release Seasons in the Mainland United States, Nature Communications (2022). DOI: 10.1038 / s41467-022-28764-0

William RL Anderegg et al, Anthropogenic climate change is exacerbating the pollen season in North America, Minutes of the National Academy of Sciences (2021). DOI: 10.1073 / pnas.2013284118

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Quote: Deterioration of allergic season: Is it due to climate change? (April 25, 2022) Obtained April 25, 2022 from https: //medicalxpress.com/news/2022-04-worsening-allergy-seasons-climate-blame.html

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