> There is no technical limitation to undoing the damage in a century or even a few decades
That's where you are wrong. That's where all of these hand-wavy so-called solutions are wrong.
It is impossible to do this in a century.
It is impossible in anything even remotely close to a human time scale.
A 100 ppm reduction in atmospheric CO2 takes a minimum of 50,000 years and, more than likely, somewhere in the range of 100K.
So many things people ignore in these arguments. For example, world-wide population will nearly double by the end of the century. We are 8 billion today. Even if we take a low estimate of about 11 billion, that's adding the equivalent of TEN USA's, two India's or two China's.
Imagine that. Add two China's to the planet and actually claim that we can UNDO atmospheric CO2 concentration inside of a century.
Enhanced weathering experiments indicate that slreading basalt dust over agricultural land in quantities roughly equal to iron tailings (a large portion can be thise exact iron tailings as it is often basalt hosted) would sequester 1ppm per year whilst improving yields. It is not enough to offset current activity, but it is enough to bring levels down to something less bad in fairly short order.
This is just one of many possibilities.
The last resort one is iron seeding the lowest-life portions of the pacific. It is proven to work at many times higher scale for much lower cost, but the potential harms are not yet fully understood.
That's where you are wrong. That's where all of these hand-wavy so-called solutions are wrong.
It is impossible to do this in a century.
It is impossible in anything even remotely close to a human time scale.
A 100 ppm reduction in atmospheric CO2 takes a minimum of 50,000 years and, more than likely, somewhere in the range of 100K.
So many things people ignore in these arguments. For example, world-wide population will nearly double by the end of the century. We are 8 billion today. Even if we take a low estimate of about 11 billion, that's adding the equivalent of TEN USA's, two India's or two China's.
Imagine that. Add two China's to the planet and actually claim that we can UNDO atmospheric CO2 concentration inside of a century.
C'mon! Give me a break! Get real!