I think acid rain and ozone were a lot easier to collaborate on and solve.
Those also caused direct visible damage as well as a clear threat.
They also weren't issues that if solved would severely damage countries' economies and standards of living. There are 300 million people in India that defecate outdoors. Their poor standard of living is one reason their carbon footprint is half the global average.
I also don't like excusing or allowing other countries to continue to pollute with impunity as if modern forms of energy production aren't available to them.
Why couldn't China just build more solar farms or wind mills instead of installing 100 GW of coal powered energy over the last ten years? That's roughly 250 coal powered power plants. Meanwhile the West has built none in 25 years and more are being decommissioned every year
We can't solve this problem when 90% of it has nothing to do with us.
I feel like people aren't seriously interested in solving this issue when focusing only on the US and speaking in uniliteral terms as if we are the ones that, if we just went carbon neutral, we'd stop climate change.
There's no carrot to get other countries to stop greenhouse gas emissions. We need a stick.
And if the stick doesn't work, we need geoengineering. And the easiest and most cost effective way to do it is with aerosols.
I fear that we'll all be right here, a bunch of old men saying the exact same thing 30 years from now, with nothing being done because people are holding out hope that by some miracle we will get everyone around the world to become carbon neutral. Meanwhile we lost 30 years of aerosol injections to at least get temps back down to reasonable levels while we try to solve this thing.
Even if we did go carbon neutral in 30 years let's say, the greenhouse gases are all still in the air. Aerosols are a way to stop the warming and even reverse it while the world transitions over to clean energy and solves the problem of carbon sequestering at scale.