Have a few minutes to help out Grist’s favorite advice columnist? Please take our survey.

Q. Dear Umbra,

I’ve been saving my yarn scraps all year to put out for the birds while they’re building their nests, but I’m wondering about synthetics, like acrylic. Most of my knitting is done with wool, but occasionally I need a synthetic for a specific project. I worry about letting those scraps “into the wild.” What’s a knitter to do?

Linda J.
Fairport, New York