One firm uses stickers that look like little globes of Planet Earth to separate green products from the rest. This method provides a way for any designer to do the research necessary to design in a sustainable manner without taking up too much room. Also, organize your green library in the same way as you do your regular library. In order words, if you use the CSI system for one, do so for the other. One problem common to all the firms interviewed is how to keep your green library current.
Sustainable design is an evolving field.
What's best today may not be so tomorrow and we must all be extremely vigilant. Small manufacturers, may of whom have excellent products, come and go so quickly that specifying their materials is chancy. Getting and assessing accurate information can also be difficult. Technologies are very complicated and it sometimes seems that the more research you do, the more complexities are revealed. Design firms need to be pro-active in assembling a viable green library.