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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><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>kellycoinguy@gmail.com<br><b>Sent:</b> Monday, April 11, 2011 12:06 PM<br><b>To:</b> ExI chat list<br><b>Subject:</b> Re: [ExI] Efficiency of wind power.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Putting solar panels all over Arizona would not change the albedo of the earth very much, if it did you could compensate with lots of white paint... :-)<br><br>Are all of the black asphalt roofs changing the albedo substantially? If so then we already have a problem roughly equivqlent.<br><br>I like moonbeams... The algae columns are ready for deployment today.<br><br>Kelly<br><br><br><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>We suffer from an illusion created by living where there are lots of people, where the natural environment has been changed considerably. Everywhere we ever go is on a road, with roads everywhere. Next time you fly, look out the window and estimate the total effect of humanity on albedo. Or if you don’t want to spend the money on a plane ticket, go into GoogleEarth and look around. Randomly choose a spot. Do you see any roads or houses? <o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Or do the following BOTEC: the typical house is about 2000 ft^2 and there are… say, ~100 million of them in the US, so just say about 2E11 ft^2 of roof area and a square meter is about ten square feet, so about 2e10 m^2 of roof area, and for estimation purposes the US is close enough to 5e6 by about 3e6 meters, so about 1.5e13 m^2, so all the roof area in the US combined is on the order of around 1 to 1.5 parts per 1000 in area, a tenth of a percent, without looking up anything. I wouldn’t be a bit surprised if all the road surfaces combined have a similar magnitude or perhaps about a magnitude more road area than roof area, still all told perhaps a few tenths of a percent.<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>When you finish with that BOTEC, consider most of this globe is ocean. Roads and roofs are not causing this old planet to warm.<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>spike<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div></body></html>