The 289 area code was created as an area code overlay for the Mississauga (Streetsville) area. Unlike the previous solutions, this process did not require the place to be geographically separated by different area codes.
Ionizing radiation is a term used for radiation whose quanta have energy to directly or indirectly ionize (one or more electrons are released from the atom of the given substance) molecules or atoms while passing through matter, hence the name ionizing radiation.
As mentioned in Harmful Effects of Ultraviolet Radiation section, the deleterious effects of UV-B radiation on individuals is related to prolonged, deliberate, and inadvertent sunlight exposure. In some individuals, this exposure leads to the development of one of the three major kinds of skin cancer: