Greenbuild Expo showcases sustainable products

More than 1,000 booths showcased sustainable products at the U.S. Green Building Council’s Greenbuild International Conference and Expo in San Francisco. Some of the most innovative products, according to Andrew Michler, were “FilterPave,” a 96% ground glass, porous paving material, and “Grasscrete,” a concrete-filled paperboard that looks like a “big egg carton.”