"5 Ways Climate Change Is Amplifying Allergies: Why You'll Be Sneezing (and Itching) More"

​As the world grapples with the consequences of climate change, scientists have been delving into the potential impact on allergies. Jeffrey Demain, a distinguished professor at the University of Washington and Director of the Allergy, Asthma, and Immunology Center of Alaska, warns that if global warming continues, we can anticipate more frequent and severe allergies. Recently, he shared his insights at Nemours/Alfred I. duPont Hospital for Children in Delaware. Here's an overview of the reasons why rising temperatures are poised to make allergy sufferers more miserable than ever.

1. An Onslaught of Potent Pollen:

The most conspicuous effect of escalating carbon dioxide levels is the impact on plants. These flora use greenhouse gas as a vital nutrient, and an abundance of carbon dioxide in the environment results in accelerated plant growth. However, this phenomenon, while beneficial for farmers in some cases, also translates to a surge in pollen production. Demain has even noted evidence that increased carbon dioxide levels lead to higher allergen concentrations in plants, surpassing the overall boost in plant growth.

1. Prolonged Allergy Seasons:

Warmer temperatures mean that plants will bloom earlier, thereby extending the allergy season.

1. Mold's Bountiful Buffet:

Elevated carbon dioxide levels encourage the proliferation of mold-friendly food sources. In certain instances, molds become more allergenic as carbon dioxide levels rise.

1. A Boost for Venomous Insects:

Demain's research has shown a surge in allergic reactions to insect stings in Alaska, where warming is occurring more rapidly than in other parts of the country. He attributes this rise to increased temperatures, especially during winter, which make it more likely for yellow jackets and other insects to survive the winter, reproduce, and sting people later in the year.

1. Escalating Ground-Level Ozone and Potential Air Pollution:

"Bad" ozone forms when nitrogen oxides and volatile organic compounds, released from vehicles and factories, react in sunlight. It is expected to increase as temperatures rise. The CDC predicts that this form of ozone will become a growing concern in many American cities. For individuals with respiratory diseases, including asthma, these rising pollution levels, combined with allergens, pose a double threat.
While most of the available evidence highlights the worsening of allergies, it's important to note that many studies have been primarily correlational. Demain is the first to acknowledge that seasonal variations will still occur, as exemplified by harsh winters like this year's. However, he asserts that the overall trends are unmistakable, even if your nose might not readily agree.