alt Hacker NewsMaybe, but cement manufacturing by itself is responsible for a staggering 8% of global co2 emissions. And we really don't have a viable option for replacing cement, and probably won't for a long time. Capturing and removing that co2 has a meaningful impact. Even if CCS were limited to just that one industry.
There are absolutely viable ways to reduce concrete emissions by about 30% - but it is staggeringly difficult to get the construction industry (including architects, structural engineers, standards bodies etc.) to change practices.