> Although the future of humanity might be short and unpleasant, this is no reason for despair. All adults know we will die. Similarly, we have long known that all species go extinct. Our character is defined by how we live in light of the terminal diagnosis we were given at birth.

There could be other opinions, of course.

https://en.wikipedia.org/wiki/Space_sunshade

> The mass of each disk would be about a gram, adding up to a total of almost 20 million tonnes.[9] Such a group of small sunshades that blocks 2% of the sunlight, deflecting it off into space, would be enough to halt global warming.[10]

https://en.wikipedia.org/wiki/SpaceX_Starship#Cost_and_fundi...

> Musk has predicted that a Starship orbital launch will eventually cost $1 million.

According to projections, Starship will bring 100 tons to LEO per launch, so if it costs $1 million, then 20 million tons will cost $200 billions. That mass will require about 200,000 launches. Multiply it by 3 to also carry the fuel - the sunshade should probably be deployed not on LEO but e.g. in L1 point of Sun-Earth system. Musk talked about a lot of flight per day - so many that some deliveries served by aviation could be served by Starships - so from many launchpads the total of 1000 launches per day doesn't look impossible.

We still have some technical ideas for how to deal with the problem. We still need more efforts in many areas.