[Resent with correction] Hi all,
Is there an alternative to rapid CDR to reduce the atmospheric CO2 level and hence slow ocean acidification? Acidification is progressing at the fastest rate for 300 million years, faster even than in the PETM [1], and spells catastrophe if not curbed over the next decade or two. I am supporter of biochar for CDR on a large scale. But few people think biochar can be scaled enough to actually start reducing the atmospheric CO2 level in the face of CO2 emissions set to climb for decades. So we need a combination of low to medium cost CDR schemes, capable of scaling to the very large. Yesterday I heard about a scheme for use of solar energy (e.g. in Sahara) to power the scrubbing of CO2 from the atmosphere and the production of hydrogen from H2O. The hydrogen would then be combined with the captured CO2 to create a carbon-neutral hydrocarbon fuel, which could then be cheaply and efficiently piped to countries wanting a green energy source, e.g. for cars and electricity generation. Apparently it's much cheaper and more efficient to pipe liquid fuel than transmit the equivalent electric power over the same distance. Cheers, John P.S. If hydrogen can be produced from H2O, could a hydroxyl byproduct be used for combination with scrubbed methane (CH4) to produce further carbon-neutral fuel? Atmospheric methane levels are rising ominously. [1] http://planetark.org/wen/64838 -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
