The climate solution beneath your feet
CaCO3 (limestone) + heat → CaO (lime) + CO2 (carbon dioxide) Making cement this way requires releasing CO2—the greenhouse gases are basically baked into the process. Solutions One major approach to cutting down on cement’s climate impact is to use less lime. You have to be careful doing this, because you don’t want to end up with cement that’s not as strong or durable as what’s needed. But mixing in a small amount of filler can help cut down on the lime you need to use without compromising performance. One…