Why will quarries (cement factory places) reduce carbon dioxide emissions?
Cement plants - not so much the quarries (although their motorized industrial vehicles will also have to start improving performance). The production of cement starts with limestone (CaCO3) plus some additional bits to provide Si, Fe and Al. The whole lot is put into a rotating kiln that roasts the mixture. CO2 off-gases, leaving high-temperature Ca-Si-Al-Fe-O compounds that form the clinker for portland cement. Because modern (and developing ) societies use huge amounts of cement for construction uses and buildings, roadways, bridges, airport runways ... - enormous amounts of limestone are roasted, releasing CO2. Look at the molecular/atomic weights, and you;ll see that 44% by mass of all the CaCO3 that is treated will report to the environment as CO2. Mark L.
