: Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and other agricultural practices and by the decay of organic waste in municipal solid waste landfills.
Traumatic Brain Injury (TBI) - Levels of Severity. Mild TBI. Loss of consciousness is very brief, usually a few seconds or minutes. Loss of consciousness does not have to occur - the person may be dazed or confused. Testing and scans of the brain may appear normal. Most common: 75%-85% of all brain injuries are mild.
a) Traumatic brain injury (TBI) TBI. Traumatic brain injury occurs as the result of some external force being applied to the brain in an accident or trauma. As a result of this blow or rapid movement, the brain may be torn, stretched, penetrated, bruised or become swollen. Oxygen may not be able to get through to brain cells and there may be bleeding.