David, list, et al Re your "...what papers...." question below, I suggest that for me the most powerful are the many from Jim Hansen - clearly saying that even 350 ppm is probably not enough. He has mentioned in his papers both biochar and afforestation in the CDR area. I presume you are familiar with his position on the need for CDR, but can give more specific citations. I seriously doubt the NRDC is going to disagree with Hansen on the urgent need for 350 or better - are you?
I think that the FOE position is more positive than John Nissen has described - and will comment on that next. I don't think it pertinent, because the subject was the Keystone pipeline, but Hansen gave powerful testimony on the need for carbon reductions before a Senate Foreign Affairs Subcommittee a few days ago. See http://www.c-span.org/video/?318285-1/hearing-keystone-oil-pipeline. Ron On Mar 16, 2014, at 7:19 AM, Hawkins, Dave <dhawk...@nrdc.org> wrote: > John, > > You say-- > the level of CO2 in the atmosphere has to be reduced if the world is to have > any chance of keeping below 2 degrees C warming. > If you are referring to today's level of CO2 in the atmosphere, what paper(s) > can you point to that support this conclusion? > > As for the FOE comments about geoengineering, I think it is worth noting that > FOE says it opposes only one form of geoengineering, SRM, and appears to be > primarily concerned about one form of SRM, stratospheric particle injection. > > David > > > Sent from my iPad > > On Mar 16, 2014, at 4:50 AM, "John Nissen" > <johnnissen2...@gmail.com<mailto:johnnissen2...@gmail.com>> wrote: > > Hi all, > > FoE says the WG2 report on climate impacts will be published on March 29th > and the WG3 report on "pathways to avoid dangerous climate change" will be > published on April 11th. <snipped> -- 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.