Sunday Times: Squeaky Green
Recommends removing shoes at the door.
I am not quite so fearful of chemicals as this article is and I do not think the advice to abandon carpets is necessarilly the best way forward.
This blog recommends that you adopt a shoes-off policy in your home, not just for family but also for guests and other visitors. Socks, slippers and bare feet are fine indoors, but not shoes. Just say NO to shoes in your house!