Total natural gas rig count in the US (including conventional gas drilling) Shale gas is natural gas that is found trapped within shale formations. Shale gas has become an increasingly important source of natural gas in the United States since the start of this century, and interest has spread to potential gas shales in the rest of the world.
A stressor is a chemical or biological agent, environmental condition, external stimulus or an event that causes stress to an organism.[1]
Silencer, means you are watching a movie. suppressor, means you are IRL. there is no such thing as a silencer that I am aware of, a suppressor is a muzzle device that suppresses the sound coming out of the muzzel... but it is most definitely not silent.