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.
Get free quotes on forced air versus central air today! Forced air. Forced-air systems can be found in most residential and corporate buildings. These systems use ducting to efficiently deliver heating and cooling to where it is needed. A forced AC unit is one of the most popular types as nearly all contractors are familiar with this system. When it comes to cost, forced-air vs. central air conditioning depends largely on the size of the house, the quality of the ducting and the AC unit itself. Be sure to hire a contractor who is well known in ...