One of the best articles I have read on Green issues related to pets is Treehugger’s How to Green Your Pet, 03. 5.07 (sorry I missed it until now) Definitely a GreenPet must read.
They discuss in depth about the various considerations pet owners should have about the effect your pet has on the planet as well as how the planet is affecting your pet. Like why you shouldn’t let your cat outside on its own, or why adapt from a shelter, why clay cat litter is bad, and don’t give junk food to your pets. Check out this article and be sure to read the comments from readers, often even more informative and interesting than the article itself.