Agree that this is a positive development, but Hansen and 350.org have been advocating bio CDR for a long time, just not packaging it in those terms. If 350 is the magic number, then obviously, emissions reduction will take too long to get there. Somehow the discussion then immediately turns to land biology- BECCS, afforestation, soil C retention, biochar, etc. as though using only 30% of the (already overexploited) Earth's surface is the best and only way to remove 50 ppm from air and 50 ppm from ocean = 780 Gt of CO2, and assuming we stop emitting fossil fuel CO2 tomorrow. I'd like to learn how we force land biology to singlehandedly achieve this, while also feeding and watering the world. Given what's at stake, I'd say a broader consideration of possibilities that includes the other 70% of the globe is required. In any case you can be sure that since the IPCC "solved" the CDR problem with BECCS and afforestation, that COP 21 will do the same, though the target IPCC/COP are shooting for guarantee a world and climate that bears little resemblance to that with 350 ppm CO2. Greg
-------------------------------------------- On Tue, 9/15/15, John Nissen <j...@cloudworld.co.uk> wrote: Subject: [geo] COP21 and French strategy for CDR To: "Geoengineering" <Geoengineering@googlegroups.com> Cc: "Ron Larson" <rongretlar...@comcast.net> Date: Tuesday, September 15, 2015, 2:50 AM Hi all, This French project, announced in April [1], is the most important development on CDR (carbon dioxide removal) that I have ever read, despite no mention of biochar. What prompted this brilliant idea? Could such projects be urged for all countries, to complement pledges for emissions reductions at COP21? Then there might be real progress towards reducing the CO2 level to 350 ppm or below, which Jim Hansen urges for preventing dangerous global warming and ocean acidification and other effects [2]. Speed is essential to prevent dangerous ocean acidification which is already serious at 400 ppm, so 350 ppm may need to be reached within two or three decades. This sets the urgency for an aggressive international CDR strategy. An ideal place to announce such a strategy would be COP21! Cheers, John [1] http://frenchfoodintheus.org/2285 [2] http://arxiv.org/ftp/arxiv/papers/0804/0804.1126.pdf -- Re: [biochar] Fwd: [soil-age] Tom Newmark's letter published in The New Yorker Magazine On 15/09/2015 02:12, Erich Knight erichjkni...@gmail.com [biochar] wrote: France recently announced a project to increase soil organic matter (carbon) by 0.4 per cent a year, which the country’s agricultural minister said would “stock the equivalent of the anthropogenic carbon gas produced by humanity today.” -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
