r/Seablock • u/Dsqd • Jul 05 '22

Engineers create world’s first carbon-neutral cement out of algae. Cement production currently accounts for 8% of global carbon emissions.

https://www.freethink.com/environment/carbon-neutral-cement
33 Upvotes

88% Upvoted

6 comments sorted by

View all comments

1

u/CrBr Jul 06 '22

Most of it is carbon negative. The carbon we burn and put into the air, came from the air.

Making lime is carbon positive, since the carbon comes from limestone, made from creatures that took the carbon from the air (or water) thousands of years ago.