If you wanted to mitigate excessive atmospheric carbon, use bio carbon capture and sequestration. And where's the most logical place to do that? The ocean, as either phytoplankton or kelp or both.
The giant kelp forests of California 90% died in the past decade. They were sequestering the equivalent of $1.5B worth of carbon per year. The geography is such that the kelp would grow and get sucked down into the deep sea each year.
If it were possible to regenerate this forest, who should get the money? Is there a way that the ecosystem itself could have a trust to ensure it’s long term ecological viability?
I don’t think governments recognizes ecological entities. There would have to be some legal trust or something that sought the money, which could be in trust for ecological wellbeing.