The success of the feature mirrored the popularity of the ecology movement itself. It started out in a lot of papers at its debut 11/21/1971, but seemed to lose its head of steam in the mid-70s. In my memory the ecology movement was similarly losing the focused attention of the public about that time (which is more interesting, mulching or disco? Oh, wait, they’re both just recycled garbage). By 1976 or so the feature was running in very few venues.
Anyhoo, the feature may also have been losing popularity because of the inherent limits of the subject matter. I mean, how many interesting ways are there to admonish people to use white toilet paper instead of the colored stuff? How many tips do we need on how to set up our own indoor herb (or even ‘herb’) gardens? in other words, the feature was probably getting pretty repetitive, and that doesn’t fly too well on the comics page unless you’re Andy Capp.
The feature ended sometime in 1981 (can anyone supply a specific date?).