: 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.
This leads to a concussion or closed brain injury that can cause mild or serious symptoms. A concussion is defined as a blow to the head that results in disturbance of cerebral function. Concussions are the most common type of traumatic brain injury and can, in more severe injuries, cause permanent brain damage.his leads to a concussion or closed brain injury that can cause mild or serious symptoms. A concussion is defined as a blow to the head that results in disturbance of cerebral function. Concussions are the most common type of traumatic brain injury and can, in more severe injuries, cause permanent brain damage.