: 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.
The Glasgow Coma Scale (GCS) is used as a guide to the severity of head injury. In the following classification the GCS score refers to the score observed after hypovolemia, hypoxia, and drug and alcohol effects have been corrected: â¢ Mild head injury (GCS score of 13 to 15) â¢