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
Pursuit of the Sun & Allure of the Earth recent Woods of Ypres concerts. Only "The Sun Was in My Eyes (Part I)" has been documented as a full setlist addition since 2009, though shortened versions of "Summer's Envy" & "The Ghosts of Summers Past" have been played in a medley style occasionally in the band's later years. Pursuit of the Sun & Allure of the Earth Pursuit of the Sun & Allure of the Earth is the first full-length album by the Canadian black metal band Woods of Ypres. It was recorded in 2004 at Spectre Sound in Tecumseh, Ontario. This marked Woods of Ypres' first release with