There are pilot projects: http://www.audi.com/corporate/en/corporate-responsibil...

		maxerickson on May 17, 2017 \| parent \| context \| favorite \| on: UH Researchers Report New, More Efficient Catalyst... There are pilot projects: http://www.audi.com/corporate/en/corporate-responsibility/we... (mentioned on https://en.wikipedia.org/wiki/Sabatier_reaction) Who knows what the economics really are, but they don't sound dire.