We already have a subtractive solution. Birth rate in the industrialized world has plummeted and the demographic wave initiated by industrializaton has crested. We can expect carbon emissions for the next several hundred years to peak soon.
In other words, the problem is solved. Any gargantuan efforts that we apply now are just about trying to get there a decade or two faster. Given the history of worldwide coordination attempts, it's not clear that it is possible or worth it.
In other words, the problem is solved. Any gargantuan efforts that we apply now are just about trying to get there a decade or two faster. Given the history of worldwide coordination attempts, it's not clear that it is possible or worth it.