Wait. I know. Vent gas.

"Vent radioactive gas?"

Some kind of gas venting through a crack in the hull.

(w) Improve energy efficiency in the hydrocarbon industry, in particular through the reduction of gas venting and flaring;

"Vent radioactive gas?" N-O.

Vent the gas from the room.

Some hideous gas through the air vents?

(h) Enhance cooperation and technical assistance to control air pollution from gas flaring and venting;

Many tanks have relief valves that vent gas to avoid explosions.

Many tanks have relief valves that vent gas to avoid explosions.