@[email protected] to World NewsEnglish • 4 days agoA Century of Human Detritus, Visualized | “Technostuff” built in the last 100 years outweighs all the living matter on Earth.www.nytimes.comexternal-linkmessage-square13fedilinkarrow-up166arrow-down15cross-posted to: [email protected][email protected]
arrow-up161arrow-down1external-linkA Century of Human Detritus, Visualized | “Technostuff” built in the last 100 years outweighs all the living matter on Earth.www.nytimes.com@[email protected] to World NewsEnglish • 4 days agomessage-square13fedilinkcross-posted to: [email protected][email protected]
minus-squareFlying SquidMlinkEnglish-2•4 days agoConcrete literally involves chemical changes. How exactly do you think they get the lime?
minus-square@A_AlinkEnglish1•4 days agoYes, of course I know for cement … but you know : my comment was about gravel (agregates in the picture) and in concrete you have aprox. 10% cement. (i have also wrote another comment about cement and carbon dioxide elsewhere in this post)
Concrete literally involves chemical changes. How exactly do you think they get the lime?
Yes, of course I know for cement … but you know : my comment was about gravel (agregates in the picture) and in concrete you have aprox. 10% cement.
(i have also wrote another comment about cement and carbon dioxide elsewhere in this post)