Meningitis is a disease caused by the inflammation of the protective membranes covering the brain and the spinal cord. While most people with meningitis recover, it can cause serious complications, such as brain damage, hearing loss or learning disabilities. A vaccination is the most effective way to protect yourself against certain types of meningitis.
Primary & Secondary pollutant. Definition: A primary pollutant is an air pollutant emitted directly from a source. A secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.
The difference is subtle but important. The Short Ram Air Intake forces a sharper blast of air directly into an engine than do standard Ram intakes. Oftentimes, these systems employ a heat shield, but they are also referred to as Warm Air Intakes because they do transfer ambient engine heat into the combustion chamber.