This is an article from National Geographic entitled "The Pollution Within". It's a little long, but it is very well narrated by a guy who had his blood tested for common household contaminants. It's not a "boring" article, by any means.
This is really not a debate, but I just wanted to bring light to an interesting article. If you've already read it, you may pass it up or read it again.
As for us, we do EVERYTHING we can to find healthy alternatives. If it means buying shampoo that costs 2 or 3 times the "regular" stuff, so be it. I'll take a shampoo without phthalates, please! Our shower curtain is made from a fabric, so we don't have to worry about PVC fumes there. We threw away any non-stick pans we had many years ago after some of my online friends lost their birds to PTFE "Teflon" poisoning (seriously, she had 4 birds drop dead within minutes of each other the first time she used her new toaster oven). We have found a nice dish soap by "Earth Friendly Products" that smells like almond. I would use it even if it weren't deemed natural. All off the make-up I use is by Everyday Minerals. After I read about methylparaben and its negative effects on reproduction, that was enough for me (it is a hormone disruptor). The few times Andrew took a bottle of my milk, it was in a glass Evenflo bottle--they really weren't that much more than the plastic ones. The Playtex Natural Nurser is also BPA-free. I got rid of all my trendy Nalgene bottles I used in college, and opted for a BPA-free one (Nalgene makes one made of Polyethylene instead). After all, I chug water all day long at work; I'd rather be chugging it from a bottle that isn't leaching chemicals into my bloodstream.
My point is, maybe one single thing seems harmless, but my belief is that a cumulative effect of all of the above is never a good thing. I can't avoid all the things I breathe in on a day-to-day basis, but I can control what I put into my body at home.