[lentulusgracchus]

That is what supposedly happened in the early Tertiary, when a vast bloom of Azolla mats drained the atmosphere of a significant proportion of its carbon dioxide, which had spiked up during and after the large outgassing event associated with the basalt flows of the Deccan Traps, which were extensive and active for several million years.

The Deccan Traps volcanism, in turn, may have been associated with the Chicxulub impact event; the Deccan Traps, at the time of the event (as determined by paleogeographical reconstructions of the terminal Cretaceous) were located in the antipodes of the Yucatan, the Indian subcontinent being then located in the middle of what is now the Indian Ocean, south of the equator.

The vast shear waves generated by the impact will have circled the earth repeatedly, propagating through the asthenosphere and crust, converging in the antipodes to cause unprecedented seismic events that generated the fracturing that allowed the Deccan basalt flood to come to surface from the asthenosphere.

[Gondring]

heck, I prefer the pass-thru hypothesis, myself... ;-)

But I was asking whether we could plant vegetation to do that.