Q. Dear Umbra,

I have two indoor cats in need of a more structurally interesting environment. The big-box pet stores and online retailers carry various cat furniture, but I am concerned about the environmental impact of things like carpet and pressboard when considering a new purchase. Can you guide me toward an eco-friendly choice for cat accessories?

Juli C.
Hayward, Calif.

A. Dearest Juli,

Most kitties I know have no problem with adopting any furniture they please as their very own (usually when you’re just about to sit on it), so it’s quite generous of you to provide something that really is just for them. If you’re not the type to go full catio, one of those contraptions that combine perches, boxes, and scratching posts ought to do nicely — a cat condo, in industry-speak.