[4] He has written papers proposing the 'Wood Vault', a process by which woody biomass is buried as a means to slow re-entry of CO2 into the atmosphere through the carbon cycle.
[5] He has argued that one of the easiest targets for the removal of CO2 from the atmosphere is to bury wood that would otherwise be mulched, burned, or simply left to rot.
He has also advocated for his carbon sequestration techniques as a possible method to mitigate fire risk in the American West and other parts of the world.
[4] Zeng first formally proposed his idea of 'Carbon sequestration via wood burial' in the Carbon Balance and Management journal in 2008.
[5] this paper highlighted a number of potential approaches; including storing biomass in frozen sites, underwater, or even in above-ground shelters.