The grad student who wrote this is probably cackling and rubbing their hands together as we speak.

It does illustrate a solid point though, which is that it is ABSURD to talk about sequestering the amount of carbon required to avert the present crisis. Geoengineering is a pipe dream that would in almost every realistic case have blowback in both environmental and geopolitical domains that we couldn't manage.

We really have just one option here, reduce our CO2 output, and even if we do that today we're still in for one hell of a ride.