Top architecture and engineering design firms are requesting and driving the transparency movement. Health Product Declarations (HPDs) and Environmental Product Declarations (EPDs) are quickly becoming the norm, according to Green Wizard. It has published open letters from 26 different high profile design firms at www.greenwizard.com/transparency, essentially stating that they want to see HPDs and EPDs before they consider specifying a product for their projects. In effect, most of these companies will soon require EPDs and HPDs and many will favor companies that have them, regardless of whether they are working on a LEED project.