When those of us who work on CO₂ removal (CDR) meet, it’s apparent that no one wants to do this and no one thinks it’s easy.

It’s far easier and cheaper to stop emitting CO₂.

The fact that some of the smartest people I know decide to work on CDR signals our desperation.

@davidho An article in "Physics Today" in the 1990s had a graph of the costs and benefits of the various ways to remove CO2. The Y-axis was a log scale so we could see everything, but there was an asterisk -- "not emitting CO2 in the first place" had a negative cost so they couldn't put it on the graph.
@Virginicus I would like to see this article.

@davidho 50% chance that issue is up in the attic somewhere. But I found this, which makes me think the original is somewhere about page 99 of Joseph Romm’s CV.

Rosenfeld, Arthur H., Tina M. Kaarsberg, and Joseph Romm. "Technologies to reduce carbon dioxide emissions in the next decade." Physics Today 53.11 (2000): 29-34.

@Virginicus I will ask him. I owe him an email anyway.