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
Mover of the Earth, Stopper of the Sun Mover of the Earth, Stopper of the Sun Mover of the Earth, Stopper of the Sun is a concert overture for large orchestra that was commissioned by Orchestre national d'Île-de-France (ONDIF) from composer Svitlana Azarova. The composition is dedicated to Renaissance astronomer Nicolaus Copernicus. The name of this composition was taken from the Nicolaus Copernicus Monument, Toruń which bears a Latin inscription drawn up by Alexander von Humboldt: "Nicolaus Copernicus Thorunensis, terrae motor, solis caelique stator" - "Nicolaus Copernicus of Thorun, mover of the earth, stopper of the sun and heavens" In the score Azarova graphically and musically shows Copernicus’s