Dog vs. Cat for the Environment

I'll admit that I never thought about this issue before but obviously, some people have.

Cat or dog - which is the best choice for the planet?
EVERYONE knows the world is divided between cat people and dog people and that, to paraphrase Kipling, pups are pups and pussies are pussies and never the twain shall meet. But perhaps it is time we began choosing our pets on another basis altogether - the environment.