As someone else who doesn't wish to reproduce, I agree. A choice is a choice. If one decides to have kids and feels they can handle the responsibilities involved, then by all means, go for it. If one feels they can't handle having kids, then that's their choice as well.

My reasons aren't for the purposes of being green, either. I just prefer cats because they're easier for me to take care of. Plus, fibroids run in the family, and I don't wish to subject my future daughters to that kind of pain where they'd have to get major surgery in the end (my mom and her sisters had to have the female plumbing yanked). My period is debilitating, and I shudder to think that's my future as it is (not that I need the stupid thing anyways...it's just that surgery is not fun).