Date: Tue, 16 Oct 1990 03:18-EDT From: space-tech-request@cs.cmu.edu To: "~/st/lists/stdigest" Subject: Space-tech Digest #73 Contents: Stuart Warmink L@ and Earth warming Keith Henson Re: L@ and Earth warming Edward Wright Re: L@ and Earth warming Rick Ellis Re: L@ and Earth warming Craig Levin Ideas vs greenhouse effect Phil Fraering Nerva ------------------------------------------------------------ From: sw@groucho.att.com Date: Thu, 11 Oct 90 10:37 EDT Original-From: groucho!sw (Stuart Warmink +1 201 386 2233) To: space-tech@CS.CMU.EDU Subject: L@ and Earth warming With all the discussion about reducing the amount of light falling onto the entire Earth, a possibly rather drastic side effect seems to have been missed. Less light presumably means less plant growth and hence less food. Stuart Warmink sw@groucho.ATT.COM Whippany, NJ, USA ------------------------------ From: portal!cup.portal.com!hkhenson@Sun.COM To: space-tech@CS.CMU.EDU Subject: Re: L@ and Earth warming Date: Fri, 12 Oct 90 08:48:49 PDT Stwart Warmink mentions a "possible drastic side effect . . . . Less light presumably means less plant growth and hence less food." Not to worry, the light level plants can use is *substantially* less than the maximum level of sunlight. In fact, growth in many plants almost stops at the noon time sunlight levels. A really large scale space operation could redirect light and raise productivity quite a bit. (not to mention moving rain patterns to more favorable places.) Keith Henson ------------------------------ Date: Fri, 12 Oct 90 11:52:27 -0500 From: "Edward V. Wright" To: hkhenson@cup.portal.com, space-tech@CS.CMU.EDU Subject: Re: L@ and Earth warming Of course, we'd probably need a better understanding of climate and weather systems than we have today. We'd also need to do a better job in educating people about science, otherwise most of them will get their opinions about "weather control" from the book Jeremy Rifkin will undoubtedly write. ------------------------------ Date: Fri, 12 Oct 90 17:37:39 PDT From: Rick Ellis Subject: L@ and Earth warming To: space-tech@CS.CMU.EDU X-Mailer: mailout v1.26 released > With all the discussion about reducing the amount of light falling > onto the entire Earth, a possibly rather drastic side effect seems to have > been missed. Less light presumably means less plant growth and hence less > food. Less plant growth would also mean more CO2 as well. -- Rick Ellis Internet: rick@ofa123.fidonet.org ------------------------------ Date: Fri, 12 Oct 90 15:23:15 CDT From: Craig Levin To: space-tech@CS.CMU.EDU Subject: Ideas vs greenhouse effect The idea about reducing the Earth's greenhouse warming is a pretty good one, IMHO. Now that we have Magellan mapping Venus, we'll have a better idea possibly as to what sort of mineral resources are over there, no? If Venus posesses large reserves of, say, pure metals {is that possible? Perhaps some of the lower-melting-point metals are free-flowing fluids on Venus?} would it not be a fine idea to cool Venus like that? How long would it take? Granted, it's unlikely that even the Earth cooler would be launched, but this idea sounds pretty nice. Craig\The Moonman\Levin ===()=== ////// moonman@buhub.bradley.edu ``-----// The Stars-Our Destination! `````` ------------------------------ Date: Fri, 12 Oct 90 13:02:36 -0500 From: Fraering Philip To: space-tech@CS.CMU.EDU Subject: Nerva There is currently a discussion going on in sci.physics on nuclear rockets; I thought the people here might be interested. Phil Fraering dlbres10@pc.usl.edu ------------------------------ End of Space-tech Digest #73 *******************