Air conditioning eventually reach the upper atmosphere. Once the refrigerant reaches the stratosphere, UV radiation from the Sun homolytically cleaves the chlorine-carbon bond, yielding a chlorine radical. These chlorine radicals catalyze the breakdown of ozone into diatomic oxygen, depleting the ozone layer that shields the Earth's surface from strong UV radiation. Each chlorine radical remains active as a catalyst until it binds with another radical, forming a stable molecule and quenching the chain reaction. Prior to 1994, most automotive air conditioning systems used R-12 as a refrigerant. It was replaced with R-134a refrigerant, which has no ozone depletion potential. Old R-12 systems
Heat of the Sun and "The Sport of Kings" were each split into two parts, bringing the US broadcast to five episodes in total. The complete series was released on Region 2 DVD in the United Kingdom on 6 July 2009. Heat of the Sun Heat of the Sun is a British television crime drama series, created by Russell Lewis and Timothy Prager, that first aired on ITV on 28 January 1998. Set in 1930's Kenya, the series stars Trevor Eve as Superintendent Albert Tyburn, a Scotland Yard criminal investigations officer who is sent to work in Nairobi to reveal the underside of the