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.
The warm planetary surfaces then emit infrared radiation of their own. The Greenhouse effect describes the condition where this infrared radiation is trapped and absorbed by gases and vapor in the atmosphere, and the atmosphere is then heated more than it would otherwise be without the Greenhouse effect.