The most likely answer would be a faulty valve somewhere, however the question is vague and more information would be needed in order to establish a more accurate answer.
Gases escape from the Earth's crust through processes such as volcanic eruptions, where molten rock releases trapped gases to the surface. Gases can also escape through faults and fractures in the crust, as well as through degassing from geothermal systems and hydrothermal vents. Additionally, some gases can slowly permeate through rocks and soil to reach the surface.
evaporation
I could not escape the music. The frantic goat made his wild escape through a hole in the pasture's fence.
The whole idea of black holes is that nothing, not even light, can escape from them. However, there are several indirect ways to detect them.
There can be several causes for the service emissions systems light to come on in a Ford Escape. The light can indicate an 02 sensor is out or it can indicate an exhaust leak.
Escape Through Time - 1993 V is rated/received certificates of: USA:PG
burning rubber
Two sea stones that causes him to escape places.
chimney
I had a narrow escape yesterday when I farted and nearly followed through!
yes she helped them escape through the under ground rail road.
Fumaroles are fissures through which water and water vapor escape from the Earth's surface.