I really like the way the author tries to ballpark orders of magnitude and compare against known-budgetary-things for frames of reference. That said, talk of 10/tonne is pure fantasy, the real band is between 100 and 1000, so the analysis here is a full decimal place naive (of course, IMHO).
Just to contribute, another americanized version of the numbers: $100/tonne of a carbon tax works out to about $0.87 per gallon of gasoline. So if you assume carbon engineerings pilot plant estimates turn out to be right but on the high-end, at $232/tonne that's an almost perfect $2/gallon.
Which raises an interesting point to ponder... if anyone were capable of extracting carbon from the atmosphere at under $200/tonne... then all the oil companies would almost instantly switch to only building those plants. Why fight for drilling rights and production share agreement terms when air is everywhere.
Just to contribute, another americanized version of the numbers: $100/tonne of a carbon tax works out to about $0.87 per gallon of gasoline. So if you assume carbon engineerings pilot plant estimates turn out to be right but on the high-end, at $232/tonne that's an almost perfect $2/gallon.
Which raises an interesting point to ponder... if anyone were capable of extracting carbon from the atmosphere at under $200/tonne... then all the oil companies would almost instantly switch to only building those plants. Why fight for drilling rights and production share agreement terms when air is everywhere.