Limestone
other on 2 shows · 4 statements across 4 episodes
4 statements about Limestone, every show
Limestone costs $30-$40 per ton and constitutes 4% of Earth's crust
“So we found that limestone specifically is, you know, you can get this stuff for like 30, 40 bucks a ton. There's trillions of tons of limestone across the world. There's four percent of the earth's crust.”
Finke: Most cement emissions stem from chemical breakdown of limestone
“And the majority of the CO two emissions from cement come from that chemistry for releasing the CO two from the rock.”
Emily Grubert: Cement production inherently generates CO2 despite clean energy inputs
“And cement, just the process of making it fundamentally results in CO₂ emissions, even if you did full energy switching, efficiency, all that kind of thing. Basically you're cooking limestone that drives off CO two.”
Ellis: Cement emissions split evenly between heat and chemical decomposition
“Cement being the most massive industry by volume in the world also produces an almost equivalent amount of CO₂, and that's, you know, again, speaking, speaking in big even numbers, it's roughly half from the fossil fuel needed to get to a thousand degrees and …”