Thanks for this well-researched and measured view of carbon-capture (something that few discuss on Medium). I had pitched carbon-capture of natural gas burning plants as an almost overnight solution (albeit at 90% efficiency and 30% higher cost), along with growing renewables. Alas, this isn't gaining traction (investors are worried about "stranded tech" that will be leapfrogged, consumers not willing to pay the added cost, questions about where to store, some technical problems). With the rapid increase (and lowered cost) of renewables (and apparerent future sunsetting of nat. gas), it would appear that reforestation, phytoplankton stimulation, and cloud brightening may be the best additional CO2 absorbing options (though the latter two also have issues). I just read an article also that says microplastics are affecting phytoplankton's ability to sequester CO2 (ouch).