It is widely recognized that old-growth trees in normal forests are excellent way to sequester carbon for hundreds of years. One variant of this technique is to harvest mature trees and use them to build long-lived structures. Another variant is to harvest woody biomass (which could even include wood from structures at the end of their lives) burn it, and geologically sequester the CO2 and other greenhouse gasses emitted by the combustion.
Most or all of the above techniques would benefit from tree-like plants that have accelerated growth-rates. This post is about two variants of these carbon super-eaters: bamboo and genetically modified variants of normal trees.