Blaine Brownell, FAIA, is an architect and materials researcher. The author of the four Transmaterial books (2006, 2008, 2010, 2017), he is the director of the school of architecture at the University of North Carolina at Charlotte.
If your clients are as concerned with embodied energy and toxicity as they are with R-value, here's a look at alternatives to fiberglass and spray foam insulation.