It’s not useless. Carbon capture will have to become mandatory at industries that will still require fossile fuels for a little longer after electrifying everything. Think cement and steel production. This is called on-site carbon capture and prevents releasing more carbon to the atmosphere. This is already happening.

Now that stupid thing that sucks C02 gas out of the air, yes, it’s total bollocka and will never ever work efficiently. Maybe if we eventually develop cheap fusion power.