The Expanded Shale, Clay and Slate Industry is committed to the efficient production and long-term performance of expanded shale, clay and slate (ESCS) lightweight aggregate. The industry and its related association, the Expanded Shale, Clay and Slate Institute (ESCSI), are also committed to the sustainable development of the entire building industry. And ESCSI proves this commitment by being on the forefront of the environmental movement since the late 1990s, when it commissioned its first life-cycle inventory (LCI) of the lightweight aggregate manufacturing process.