Larry is a PM2.5 fine particle that lives in smoke from fires. Learn about the science of smoke and how fine particles like Larry can affect your health.

This is Larry. Larry is a PM2.5 fine particle. He sounds complicated, but he’s pretty simple.

He and his mates live in fire smoke. He’s not the only thing that lives there. But Larry and his mates… they’re the real troublemakers. 

Larry’s size makes it easy for him to slip into your airways and hang out in your lungs. 

Larry’s small. Microscopic, in fact! He’s so small that 40 Larrys can lay side by side on the width of a human hair… so fine particles like Larry can cause some serious problems for the heart or lungs in some people. 

That’s why it’s important to keep Larry out of your lungs. Stay safe and keep your airways clear.


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This page has been produced in consultation with and approved by: Better Health Channel

Last updated: January 2017

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