Carbon Engineering recently published findings from internal research showing that the company’s direct air capture (DAC) technology could remove harmful carbon dioxide from the atmosphere at a cost of $100 or less per tonne, writes Russell McCulley.

Keeping the price per tonne down will be critical to the technology’s uptake but some observers have expressed scepticism about DAC's economic prospects.

Equity research firm Redburn said the technology “has interesting commercial potential — for instance in (enhanced oil recovery) or boosting long-run Permian (basin) recovery factors...