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]
Some stresses get you going and they are good for you-without any stress at all many say our lives would be boring and would probably feel pointless. However, when the stresses undermine both our mental and physical health they are bad. In this text we shall be focusing on stress that is bad for you. The difference between stress and a stressor - a stressor is an agent or stimulus that causes stress. Stress is the feeling we have when under pressure, while stressors are the things we respond to in our environment.