Vapor-compression refrigeration replaced, such as sulfur dioxide. Haloalkanes are also an order(s) of magnitude more expensive than petroleum derived flammable alkanes of similar or better cooling performance. Unfortunately, chlorine- and fluorine-bearing refrigerants reach the upper atmosphere when they escape. In the stratosphere, CFCs break up due to UV radiation, releasing their chlorine free radicals. These chlorine free radicals act as catalysts in the breakdown of ozone through chain reactions. One CFC molecule can cause thousands of ozone molecules to break down. This causes severe damage to the ozone layer that shields the Earth's surface from the Sun's strong UV radiation, and has
The Languages of Tolkien's Middle-earth are all the languages in "The Lord of the Rings", except for Entish (of which no real examples are given; the closest we get is Elvish words strung together in an Entish manner, a sort of Ent pidgin). The Languages of Tolkien's Middle-earth The Languages of Tolkien's Middle-earth is a book on the languages of Middle-earth by Ruth S. Noel. The first edition, entitled "The Languages of Middle-earth", was published in 1974 by Mirage Press, Baltimore. The revised version was published in 1980 by Houghton Mifflin. Ruth S. Noel, also known as Atanielle Annyn Noel, is the author of "The