http://www.amersports.com/media/news/view/ispo_2009.html
The Atomic Renu is the first Alpine boot that is made of renewable raw materials but still matches traditional boots in performance. Renu is made 80% of renewable and recyclable materials. Moreover, its production generates clearly less carbon dioxide emissions than is normally the case.
The Renu boot has been granted ‘Planet Positive’ status by dcarbon8, a carbon and sustainability consultant, for its environmental friendliness. However, it does not compromise on performance nor is it heavier than other boots.
The testers seem to like them....
http://community.skinet.com/_Atomics-New-Ski-Boot-The-3-Rs-1/BLOG/207632/6260.html
On my feet the boots felt a lot lighter than my Head S8's, have a translucent shell, which looks 8) and have a very springy flex.
Sadly, as cem only sells boots that fit his customers properly, I came home empty handed :(
If you fancy trying a pair, AFAIK, ordinary ski shops will have their stocks in the autummn ready for the winter season.