Typically, such proposals have some sort of "active" element in order to 
maintain stability, since SEL1 is only a meta-region of quasi-stability.  A 
couple of the Lagrange points have true stability, but they would not be in 
a location optimal to function as a geoengineering proposal.

Alternatively, that lack of true stability is pointed to as a reason why, 
if space-based methods did not work for whatever reason and/or had 
unintended effects, they could simply be allowed to float off into outer 
space.

On Thursday, June 30, 2022 at 3:03:10 AM UTC+2 [email protected] wrote:

> Re: "Space Bubbles". It's an interesting idea but how would solar wind and 
> gravity keep 1.27 trillion bubbles in a Lagrange Orbit?  Wouldn't the 
> bubbles be prone to unpredictable (solar wind) blowing and not be very well 
> held down by gravitational forces due their small mass? (Non-expert 
> knee-jerk reaction.).
>
> Ron Baiman
>
>
>
> On Wed, Jun 29, 2022 at 6:53 PM Ron Baiman <[email protected]> wrote:
>
>> May I suggest the cooling methods listed in this draft HPAC cooling 
>> document (that will be discussed in a Zoom meeting tomorrow 
>> contact me if interested) as alternatives: 
>>
>> https://docs.google.com/document/d/1TowThwi6j6cX3iLGBRrj22D30cYhKa_9/edit
>>
>> Also per this document, I think what got us into this mess is 
>> "hunter-gatherer" industrial civilization, and I would tend to focus more 
>> on the need for 
>> more energy to lift up developing countries, and economic equity and 
>> transfers of funding and technology from rich to poor as necessary for a 
>> rapid and at scale long run solution.
>> In the short-term (as I think all on this list agree) we need to cool!
>>
>> Best,
>> Ron Baiman
>>
>> On Wed, Jun 29, 2022 at 6:21 PM Gilles de Brouwer <[email protected]> 
>> wrote:
>>
>>> It's definitely the safest from a don't mess with the atmosphere 
>>> standpoint, assuming a minimal number of launches are needed and the 
>>> resupply is accomplished from lunar materials.   Lagrange point orbits need 
>>> active stabilization, so capability to turn it off could easily be built in 
>>> if needed to compensate for a very large volcanic event induced climate 
>>> cooling or other reasons.  
>>> However orbital stability and durability may be a challenge.
>>>
>>> Thanks,
>>> Gilles de Brouwer      
>>> cell 562-522-6856 <(562)%20522-6856> 
>>> [email protected]
>>>
>>>
>>>
>>> On Wed, Jun 29, 2022 at 9:32 AM Greg Rau <[email protected]> wrote:
>>>
>>>>
>>>> https://medium.com/predict/can-mits-space-bubbles-completely-stop-climate-change-9dbd1ead4e83
>>>>
>>>>
>>>> "You may have noticed that the world is falling apart, and it is all 
>>>> our fault. Humanity’s greed and gluttony have caught up with us, and 
>>>> planet-scale karma is heading our way fast. We are trying hundreds of new 
>>>> cutting-edge technologies in hopes of slowing down or even stopping this 
>>>> catastrophe, but as of yet, we have not found the silver bullet to solve 
>>>> this problem. Thankfully, a team at MIT thinks they have found the answer. 
>>>> They’re looking to put giant bubbles in space to blot out the sun. But how 
>>>> does this stop climate change? Are “Space Bubbles” really a one-stop 
>>>> climate solution? And is this mad idea even feasible?"
>>>>
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