1/3 Follow the money. This XPrize--funded partly out of oil/tar sands funds--was motivated by interest in reducing political pressure on existing sources by finding uses for CO2
https://www.eenews.net/stories/1063730291 via @EENewsUpdates

2/3 The two winners are smart companies trying to do something useful but--not their fault--the focus on high-cost and low-scalability methods is being used as a politically convenient distraction from what could be done now...

@CarbonWrangler: agree?

3/3 ...Suppose one wanted to cut life-cycle emissions from cement quickly at lowest cost. Answer is almost certainty to capture high-concentration CO2 from cement plants at Mt-CO2/year scale and inject underground for disposal. This can be done with existing tech today.