Saturday, Jul 12

Welcome to Your Daily Dot where Dot will share tips, advice, and stories on how we can make our world better.

Dear Dot,

I’ve never struggled with allergies as much as I am this year! I read somewhere that tree pollen has become more “allergenic” because of longer warm seasons caused by climate change. Is that really the case? Is more pollen all bad? Or is this good news for our pollinator friends?

– Julia

Dear Julia,

Achoo! Dot is on week three of a congested nose and sneezing and a growing conviction that this isn’t just a stubborn cold. So let’s first consider this part of your question: Is climate change causing tree pollen to be more “allergenic”? 

It is widely accepted that a warming climate is producing more pollen. As Climate Central, an independent nonprofit group of scientists and communicators, reports in Seasonal Allergies: Pollen and Mold, “North American pollen seasons became longer (by 20 days on average) and more intense (21% increase in concentrations) from 1990 to 2018. Human-caused warming accounted for about half of the shift toward earlier pollen seasons and about 8% of the increase in spring pollen concentrations during this period.” But they argue that it isn’t just pollen that’s wreaking havoc with our respiratory systems. Warmer winters mean that mold that’s surviving through our cold seasons can trigger spore allergies. 

What else does Dot have to … achoo … say about allergies? And is all this pollen good for pollinators? Read on.

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