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In a U.S. First, a Commercial Plant Starts Pulling Carbon From the Air
(www.nytimes.com)
This is a most excellent place for technology news and articles.
An argument is that this is what we should use excess green electricity for. But it does not make sense to run such expensive equipment only a few hours each day. I prefer matching the supply to demand with hydro storage, not to mention that most grids are nowhere near 100% renewable.