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.
Radiation exposure to effects of alpha (Î±), beta (Î²) and heavy particles, neutrons of unknown energy and high-energy protons, fission fragments, gamma (Î³) and X-rays is a matter of public health. These radiation sources can be found in nature, and some are created by human activities, e.g. x rays.