Of course, if you have inexpensive direct air capture of CO2, and a way to permanently store the carbon (e.g, as a block of coal, or by injecting CO2 deep under

Of course, if you have inexpensive direct air capture of CO2, and a way to permanently store the carbon (e.g, as a block of coal, or by injecting CO2 deep under ground), then all of a sudden, burning fossil fuels can be made climate neutral. If the cost of sequestering the CO2 and pumping + refining oil / natural gas is less than the cost of capturing H2 and using it to synthesize fuel with the CO2, then the synthetic fuels are a dead end. (Until we run out of oil, but that will he centuries from now.)