Sonoma Cast Stone has developed a new family of kinder, gentler concrete mixes. The EarthCrete line replaces as much as 30 percent of the Portland cement normally found in concrete with recycled materials, resulting in lightweight concrete with a smaller carbon footprint. Formulas vary with the specification. EarthCrete Platinum, for example, uses 73.75 percent industrial waste and 25 percent Portland cement replacement. Sonoma Cast Stone Corp., 877.283.2400;