Carbon capture sounds simple. Capture a couple billion tons of carbon dioxide from the atmosphere. Stick it somewhere out of the way for a couple of centuries. Presto! Average global temperatures start declining and we all can go back to our unlimited growth economic scenario without feeling guilty. It’s brilliant! There’s only one problem. The carbon capture technologies we have available at the moment can only remove a thimbleful of carbon dioxide at a time and costs upward of $300 a ton to do that. If that’s the best humans can do, it will be a long, long time before any significant decline in the concentration of carbon dioxide…
