Consider rugs that are made with natural fibers (cotton, hemp, jute, and wool), are formaldehyde-free, and then lay them down on grip pads that are not made with carcinogen PVC.
The following are some nice green alternatives.
Prairie Rugs at Target
Felt Rugs at Peace Industry
Jute Rugs at West Elm
Cotton Chenille Rugs at Amazon.com
Information provided by Ideal Bite
Smart Move Design is a Home Staging and Redesign company located near Syracuse, NY and serves the Central and Northern New York areas.