The best idea I've heard is to grow fast growing plants then burn them to make power while you capture the carbon using a portion of the power generated - the carbon is either mineralised into building materials or dumped in the old coal mines where the carbon originally came from.

It's a great way of dealing with excess biomas from managed spaces like coppiced city trees, the same can work with algee either cleared from waterways or grown purposeful in polluted water where it'll help extract various toxic elements.

We really have made so many amazing advanced in tech the can help balance the atmosphere but there's so much negativity from both sides they don't get anywhere near the attention they should.