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.
Modern techniques and increased knowledge about radiation have lowered the incidence of severe radiation sickness. Systemic reactions to radiation include a general feeling of malaise, loss of appetite or nausea and vomiting, and headache.