Carbon Vacuum Cleaner

If atmospheric carbon is indeed an environmental threat and a problem to be solved there are basically two approaches: One is to limit carbon dioxide emissions, a measure which would have severe economic consequences. The other is to suck the carbon from the air once it's there. A story at NPR discusses the work of a physics professor by the name of David Keith who is working on the latter approach.

Keith is on a patch of blacktop on the campus of the University of Calgary, in Alberta, Canada, where until very recently he has been a professor. Now his academic hat is Harvard, where he is both a professor of public policy and a professor of applied physics. His hard hat is a little start-up company, called Carbon Engineering, housed on the Calgary campus. And that company is building a machine that can actually suck carbon dioxide from the air.

The technology at the core of the device is not new. "People have done this for a long time," he says. "There were commercial processes that took CO2 out of the air, in fact, in the 1950s, so there's no mystery that we can do it."

But those companies were just extracting small quantities of carbon dioxide for industrial purposes. Keith is after a much more important question, one that is universal for anyone trying to develop a technology: Can it be done affordably on a grand scale?

"So our interest is in building full-scale commercial systems that would take tens of thousands of tons — or more — of CO2 out of the air," he says.

You can read about Keith's work at the link. If his ideas work it would have enormous implications for public policy, at least those policies designed to curtail carbon emissions.

I wonder if Keith got any of the stimulus money of the sort that was showered on Solyndra. Probably not unless he was a big donor to the Obama campaign.