Posted by: Roger Pielke, Jr.
David Keith sends in this thoughtful response to my recent post on air capture.
Author: David Keith
While Roger raises some interesting points, I think the original post overstates the near-term importance of air capture. In speculating about the potential importance of air capture, I find myself caught between two very different possible futures.
In one future, which we might call the linear future, I assume that we live in a world in which carbon prices/constraints are (roughly) equal across economic sectors and in which they increase gradually, and in which they gradually apply to a larger and larger set of countries. This world is the subject of most economic models of the climate problem. In this world, it will be a very long time before air capture technologies become economically competitive, if indeed they ever do.