It is always very overwhelming for clients as well for design professionals to determine which product is the best sustainable choice for each project.
Many factors need to be carefully considered, especially now since almost all products claim to be "Green".
BREEAM. In Europe you might find help by looking at the certification system originated 1990 in the UK called BREEAM - Building Research Establishment Environmental Assessment Method.
- BREEAM is an equivalent rating system to LEED (Leadership in Energy and Environmental Design).
- BREEAM is publishing the Green Guide to Specification (read ithere) which will be helpful for your to evaluate different types of products.
- A presentation called "Flooring and Internal Partitioning" (read it here) discussed at the Surface Design Show in London in 2009 might be of interest to you as well.
DGNB. Alternatively you can obtain help from the German evaluation system DGNB (Deutsche Gesellschaft fuer Nachhaltiges Bauen | German Sustainable Building Council) established in 2007.