Thanks Mucho.... 
"...for the range of climate states between glacial conditions and ice-free Antarctica."Wow; relating conditions 50 Mya to CO2 levels is really something; but regardless of the scale of comparison....
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The penultimate sentence from the Abstract
(seems a bit awkward; maybe it started out as two sentences?):
"An initial 350 ppm CO2 target may be achievable by
phasing out coal use except where
CO2 is captured and
adopting agricultural and forestry practices that sequester carbon."It sounds
...or maybe it's just me... as if he sees coal-use sequestration as separate from the "agricultural and forestry practices that sequester carbon."
Certainly there are methods to "scrub" CO2 out of coal-use emissions, and there are better technological methods being developed; but we could, right now, just use the bio-based (agricultural and forestry practices) sequestration of CO2 to offset the coal-fired power plant emissions.
Bio-based sequestration could rapidly reduced CO2 levels, even with increasing emissions,
if done on a large enough scale. IMHO...but not let up on the CO2 abatement technology either.
Thanks again for the link!
