The "best" IPCC AR6 climate scenario assumes currently nonexistent carbon removal technology and linear growth in said nonexistent carbon removal efficiency as the nonexistent technology "matures"
The "best" IPCC AR6 climate scenario assumes currently nonexistent carbon removal technology and linear growth in said nonexistent carbon removal efficiency as the nonexistent technology "matures"
I also have background in Earth science. Sure silicate weathering can drawdown atmospheric CO2, but not at the scale necessary, or envisaged on the SSP1-1.5. All the silicate rocks on earth's surface takes out 0.13 Pg C/yr. Humans are releasing 15 PgC/yr. You need a carbon sequestration plants/facilities that remove 100x more C than all exposed silicate rocks on Earth's surface, and somehow find the energy to power the sequestration facility(ies) that is not emitting extra C to the atm
Yeah that’s why it’s still a bit far away in terms of until wide scale utility. We don’t need to remove more than 100x the amount, we need to accelerate the rate of carbon uptake 100 times which sounds daunting but in no way is not possible given our current understanding of how the geochemical process actually works.