[ExI] Limiting CO2 was Global cooling

[Keith Henson]

On Wed, Sep 11, 2013 at 02:55:10PM -0700, Keith Henson wrote:

> That's probably correct, but perhaps not certain.  It looks like a
> really aggressive power satellite project could keep the CO2 short of
> the 450 ppm level.

Any air (flue gas initially) scrubbing will be competing with
burning fossils (apropos burning fossils, Denmark outlawed fossil
burners in new home heating). Don't see CO2 levels slowing
down before 2080, nevermind reversing. By that time methane
and water will dominate the greenhouse effect.

I make the claim that if started soon, i.e., in the next few years and
pushed hard, the peak CO2 level will happen 22 years later according
to the spreadsheet model.  So if it started by 2015, then the CO2
would start coming down by 2037.  I don't mind you disagreeing with
me, but I would appreciate an analysis of what I have wrong with the
model.  (The question of it never being done is a different problem.)

> As a side effect of that effort, we might be able to put sunshades in L1.

Any massive SPS constellation in LEO will automatically cause
shading all by itself.

Actually, no.  Think about the geometry.  The earth GEO and the sun
only line up for a couple of weeks around the equinoxes.

Keith


> Of course we still have to worry about the friendly AIs eating our brains.

Sounds suspiciously like zombies.

> (Assuming they have not done it already and we are simulations.)

Then, we are golden, and have to do nothing! You Could Be Immortal Already!