https://www.siliconvalley.com/2019/12/02/linkedin-is-getting-serious-about-eco-friendly-buildings/ > Many Silicon Valley companies want to reduce their carbon footprint, but some are doing so from the ground up. > LinkedIn is using a more environmentally-friendly concrete to expand their campuses. This may not sound like a sexy concept, but production of cement, the key ingredient in concrete, contributes to 7% of global man-made greenhouse emissions, according to the International Energy Agency.