Direct air capture is inherently expensive unless you are doing it in the airstream of some industrial process that produces large amounts of CO2, and even then

Direct air capture is inherently expensive unless you are doing it in the airstream of some industrial process that produces large amounts of CO2, and even then its still somewhat expensive. Even as a waste product from separating Nitrogen, Oxygen and Argon from the air, its still expensive (retail its ~$1/lb of liquid CO2).