The Safe ’N Sound door line offers a sustainable way to outfit your interiors. Manufactured with low-emission adhesives and sealants, the doors are DorCor low-density fiberboard, which is made from renewable wheat straw and contains no urea-formaldehyde. The solid-core doors are available in smooth and textured styles. Cost: Under $100 for slab only. Masonite. 800-663-3667.