Carbon capture? Go for the source (MIT)
Since most of the world’s governments have not yet enacted regulations to curb
emissions of greenhouse gases, some experts have advocated the development of
technologies to remove carbon dioxide directly from the air. But a new MIT
study shows that, at least for the foreseeable future, such proposals are not
realistic because their costs would vastly exceed those of blocking emissions
right at the source, such as at the powerplants that burn fossil fuels.
Some purveyors of various new technologies for scrubbing carbon dioxide out of
the air are reminiscent of “snake-oil salesmen,” says Howard Herzog, a senior
research engineer at the MIT Energy Initiative and co-author of the new
analysis published this week in the _Proceedings of the National Academy of
Sciences_. The study was co-authored by MIT civil and environmental
engineering postdoc Kurt Zenz House, along with researchers at C12 Energy in
Berkeley, Calif., and at Stanford University.
Herzog and his co-authors are not alone in criticizing these proposals. An
analysis earlier this year by the American Physical Society came to similar
conclusions, although Herzog, a peer reviewer of that study, says that report
“didn’t go far enough” in its criticism of air-capture systems. …
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