KUOW - Have you noticed all the cotton fluff in the air?

What is the fluff in the air? Is it safe?

KUOW - Environment

What are those tumbleweeds of fluffy stuff in Vancouver? - Vancouver Is Awesome

Cottonwood 'masting' leaves Chicago blanketed by white fluff - Chicago Sun-Times

Flurries, with Blowing and Drifting . . .

Flurries, with Blowing and Drifting . . .

KUOW - Environment

Cottonwood Tree Facts

Flurries, with Blowing and Drifting . . .

Cottonwood fluff filling skies again