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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> extropy-chat-bounces@lists.extropy.org [mailto:extropy-chat-bounces@lists.extropy.org] <b>On Behalf Of </b>John Clark<br><b>Subject:</b> Re: [ExI] cure for global warming<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='color:#1F497D'>…</span><o:p></o:p></p></div></blockquote></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='color:#1F497D'>></span>Who cares? Myhrvold isn't a fool and he wasn't suggesting you do it that way, he said have pumps every thousand feet or so "each one less powerful than the one in my swimming pool".<span style='color:#1F497D'> </span>John K Clark<span style='color:#1F497D'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hmmm, that notion is a big yellow flag: if a pump every thousand feet, clearly it requires SO2 in a gaseous form as opposed to a liquid, for smallish pumps don’t make anything like 1000 ft of head with the throughput volumes needed for something like this. Typically the water pressure to one’s house is a tenth that. If he meant turbopumps for gaseous SO2, those turbines would be heavy.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Does it need to be exhausted at 18 miles? Would a pipe up the side of K2 or Mt Everest (ending on top) be high enough? What’s that, nearly 6 miles up? If the stuff is superheated and pressurized at exhaust, wouldn’t it loft way the hell up there? I could imagine it reaching equilibrium at perhaps 10 miles altitude. Another approach might be to freeze SO2 to a solid brick perhaps the size of a typical Detroit and hurl the thing aloft with an electromagnetic rail launcher from a high peak, with an explosive device within which explodes at the apex, so that the bits evaporate upon descent.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Of course all this assumes one thinks it a good idea to dump SO2 in the upper atmosphere to counteract global warming (which I do not) but it isn’t clear to me we need to hold aloft a pipe to do it. If we decide to solve all the engineering difficulties to erect an enormous pipe, Keith knows better uses for it than pumping SO2 into the sky. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>spike<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>