The online GreenSpec® Product Guide lists over 2,200 environmentally preferable products selected by editors at BuildingGreen, LLC. The guide includes key insight on the green attributes of each product and the most critical green issues for each product category. Editors at BuildingGreen conduct their own independent research in assessing manufacturer claims, ensuring that the directory contains unbiased, quality information. GreenSpec does not charge for listings or sell ads. GreenSpec product listings are accessed on BuildingGreen.com with a subscription to BuildingGreen Suite.