CALSTAR. This company’s masonry pavers contain 40% post-industrial recycled content, including fly ash recovered from coal-fired power plants. The pavers, available in Holland and water-permeable styles, are made in a low-heat, high-humidity process that results in an 85% lower carbon footprint and eliminates the Portland cement used in standard concrete pavers. According to the manufacturer, a 1,000-square-foot patio of CalStar pavers diverts 5 tons of waste by-product from landfills, eliminates 3,420 pounds of CO2 emissions, and saves 2.25 million BTUs of energy. The sustainable pavers meet ASTM standards and contribute to multiple LEED credits. 877.700.9501.