This 2016 paper "proposes an inventory analysis method to evaluate the greenhouse gas (GHG) emissions from Portland cement concrete pavement construction."
This downloadable Nature article describes the looming shortage of sand that faces cement manufacturers. It takes 10 tons of sand to produce 1 ton of cement.
This 2022 United Nations report recommends actions to conserve sand and gravel stocks, to protect sand- and gravel-bearing environments, and to prevent armed conflict over the control of this vital resource.