In-ground fire suppression system

A device for suppressing fire by removing oxygen from a local atmosphere, the device comprising one or a plurality of tubes, buried approximately vertically in the ground, each tube having an upper end in open contact with the atmosphere and a lower end in contact with an underground chamber, wherein the underground chamber contains an electron-donating substance, wherein the upper end of at least one of said one or a plurality of tubes has functionally associated therewith a suction system which sucks air from the local atmosphere into the underground chamber, and wherein the electron-donating substance reacts with atmospheric oxygen in the air to reduce it and convert it to a form that does not support combustion, effectively removing oxygen from the local atmosphere.