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]
Stress Hormones. Stress is the sum total of all mental and physical input over a given period of time. The marker used to measure stress is the adrenal steroid hormone, cortisol. Stress, whether physical or emotional in origin, provokes a response by the adrenal glands. Many hormonal imbalances are the direct result of adrenal insufficiency. The adrenal glands produce two primary hormones, DHEA and cortisol. Both are considered the major shock absorber hormones in the body. They buffer stress and the negative impact it can have on both mental and physical function. Long-term stress can have a serious impact on the adrenal glands and cause them to shrink and reduce production.