>>12013600Plankton fertilization
https://en.wikipedia.org/wiki/Iron_fertilizationIt's the simple solution that was too simple to be allowed to happen.
(companies that wanted to engage in it were shut down so CO2 credits could stay expensive)
Also Nuclear>Solar
Gen IV reactors using uranium filtered from sea-water are the only option we currently know of that is able to provide a European standard of energy consumption for the next several thousand years for the whole planet.
And this without a long-therm impact on the environment. (transmutated waste only needs to be stored around 500 years, and the reactors are physically incapable of meltdowns.)
