[PolKnops]

First and foremost: We must reduce emissions, FAST Secondly we need a multiple set of solutions. And now the answer to your question. - we as human kind of moving Gigatons of sand/aggregate every year. Part to be extract minerals/coal below them. Part to make roads, dikes, beaches etc etc. So these quantities are already moved around. In contrast with plastic, the olivine needs to be mined, crushed and applied. So a lot less work as making plastics