Sequestration only starts making sense when we have basically unlimited green energy to throw at it. I know some moments have excess green energy already but you're not going to build a huge plant and run it only 2 hours a day.
The amount of natural resources needed to build enough plants to make it more than a drop in the bucket is also going to require significant mining operations and other big polluters. It's a nice idea but science fiction for now, at least at a scale that is actually effective at countering climate change.
And even if we had unlimited energy and materials the inertia of greenhouse emissions (the CO2 heating us now was emitted decades ago) building it at scale will come too late to avert a crisis.
It's still much easier and more efficient to avoid emitting the carbon we still do than to try and capture it back. Though even that will come too late really.
The amount of natural resources needed to build enough plants to make it more than a drop in the bucket is also going to require significant mining operations and other big polluters. It's a nice idea but science fiction for now, at least at a scale that is actually effective at countering climate change.
And even if we had unlimited energy and materials the inertia of greenhouse emissions (the CO2 heating us now was emitted decades ago) building it at scale will come too late to avert a crisis.
It's still much easier and more efficient to avoid emitting the carbon we still do than to try and capture it back. Though even that will come too late really.