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  1. #31
    Occasional Member Evan's Avatar
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    Quote Originally Posted by rhinosaur View Post
    We could also just build a big screen to block out the sun for part of the day.
    Quote Originally Posted by Jack Flak View Post
    Don't ship too many panels up, since we're headed for an ice age in a bit.
    Agree with Jack. If you got it into orbit, you'd have to make sure to build something in for taking it down without causing damage. It'd probably cost a ton.

  2. #32
    にゃん runvardh's Avatar
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    Quote Originally Posted by ptgatsby View Post
    Yup, although this is true anywhere - it tends to be warmer when it is cloudier.

    I guess that makes sense. I figured, however, that it wouldn't be as effective because the upper areas tend to reflect 50%+, and so the 50% that hits grounds only feeds back 10-90%, which then only reflects 50% back, down to the limit.

    But of course, I also don't know how much increased cloud cover there would be from temperature change.
    I'm thinking the way that it would truely show any real progress is if it was always cloudy everywhere during the day, and totally clear at night. This would kind of suck though in many other ways, but if people were really serious about this...

    By the way, I think water vapor is on the green house gas list along with CO2 and CH4.
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  3. #33
    Senior Member ptgatsby's Avatar
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    Quote Originally Posted by runvardh View Post
    I'm thinking the way that it would truely show any real progress is if it was always cloudy everywhere during the day, and totally clear at night. This would kind of suck though in many other ways, but if people were really serious about this...

    By the way, I think water vapor is on the green house gas list along with CO2 and CH4.
    It is, so I suppose it wouldn't matter anyway

    Meh, just pain the roads white. Problem solved. Next!

  4. #34
    にゃん runvardh's Avatar
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    Quote Originally Posted by ptgatsby View Post
    It is, so I suppose it wouldn't matter anyway

    Meh, just pain the roads white. Problem solved. Next!
    This would actually lower the temperature of a downtown core by a degree or so which actually matters more than some people may think.
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  5. #35
    Senior Member ptgatsby's Avatar
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    Quote Originally Posted by runvardh View Post
    This would actually lower the temperature of a downtown core by a degree or so which actually matters more than some people may think.
    And you thought I was joking.

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  6. #36
    にゃん runvardh's Avatar
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    Quote Originally Posted by ptgatsby View Post
    And you thought I was joking.

    Roofs too!
    Again, this would help, but only in places of high population density.
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  7. #37
    Glowy Goopy Goodness The_Liquid_Laser's Avatar
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    Quote Originally Posted by rhinosaur View Post
    We could also just build a big screen to block out the sun for part of the day.
    Is there a way to block out some of the heat without blocking any of the light?
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  8. #38
    Senior Member LostInNerSpace's Avatar
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    Here's an idea. How about some kind of nano material capable of storing an electrostatic charge. The ambient heat causes the nano-material to rise, and somehow the particles get electrostatically charged, the charge is then collected at the top?

    The ambient heat would actually cause hot air to rise and carry the particles with it.

    I never said it would be a practical idea.

  9. #39
    にゃん runvardh's Avatar
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    Quote Originally Posted by LostInNerSpace View Post
    Here's an idea. How about some kind of nano material capable of storing an electrostatic charge. The ambient heat causes the nano-material to rise, and somehow the particles get electrostatically charged, the charge is then collected at the top?

    The ambient heat would actually cause hot air to rise and carry the particles with it.

    I never said it would be a practical idea.
    If you're pulling heat out of the air, it would descend at the screen as it cools. Interesting idea though.
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  10. #40
    Senior Member ptgatsby's Avatar
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    Quote Originally Posted by The_Liquid_Laser View Post
    Is there a way to block out some of the heat without blocking any of the light?
    Put the shade far enough away... It would reduce the overall light, but not generate complete shade in any area.

    Typically though the sun shade idea involves objects at L1, which is too close for this to be feasible. The plus side is that you can just throw objects into space, including stuff like ball bearings, and get an effect. Seems like a good spot to donate garbage to.

    Well, maybe not. Might want to reserve that space for earth-stations.

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