Cement is bad for the environment because it accounts for 5% of carbon emissions by sector. Carbon is released from carbon through the fuel used to combust the limestone. The use of heat through calcination is not the only source of emissions. Calcination itself releases carbon from the limestone and accounts for 50% of the carbon emission of cement production.
Because of concrete and asphalt, larger cities experience higher temperatures compared to their surrounding areas–an effect known as the urban heat island (UHI). Concrete covers green areas and, thus, decreases the amount of carbon dioxide absorbed from the air. It prevents rainwater from restoring natural groundwater.
Cement doesn’t allow the growth of the most natural entity in the world; plants. The crevices of concrete that weeds and the like squeeze into are due to the fact that they are repelling the human creation we have poured atop of the ground. The desire of the plants to thrive despite these circumstances is proof enough that they are working towards living, because that’s the way they need to exist, not underneath cement, burying their efforts at life. (no pun intended.)
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