DuPont. The Corian Terra collection of solid surfaces, made with recycled materials, now includes 33 colors; five colors have at least 20% pre-consumer recycled resin content as certified by SCS. The material, which can contribute to LEED points, is nonporous, and, with proper cleaning, does not promote the growth of mold, mildew, or bacteria. All colors are Greenguard Indoor Air Quality certified. 800.906.7765. www.countertops. dupont.com.