And when it comes to price gains during the first six-years of a recovery, the current market is second to none. Between March 9, 2009 and March 9, 2015, the S&P 500 has increased by 202%. The only other market run that comes close is the postwar expansion, where the S&P returned 192% in the same time period.
Arctic Ozone Hole. CFCs Chlorofluorocarbon (CFC) is an organic compound that contains carbon, chlorine, and fluorine, produced as a volatile derivative of methane and ethane. A common subclass is the hydrochlorofluorocarbons (HCFCs), which contain hydrogen, as well.Freon is DuPont's brand name for CFCs, HCFCs and related compounds.he most common representative is dichlorodifluoromethane (R-12 or Freon-12). Chlorofluorocarbons (CFCs) are a family of chemical compounds developed back in the 1930's as safe, non-toxic, non-flammable alternative to dangerous substances like ammonia for purposes of refrigeration and spray can propellants.
The ozone layer is essential for complex living organisms (like you and me) to exist. Without the ozone layer, all but very simple life forms would be destroyed by the action of ultraviolet light. Some chemicals, particularly CFCs, destroy ozone in the upper atmosphere.A CFC is a chlorofluorocarbon molecule. It is similar to an alkane with all the hydrogen atoms replaced with chlorine and fluorine atoms.In the presence of ultraviolet light a CFC molecule will decompose producing highly reactive chlorine free radicals.These chlorine free radicals will react with ozone molecules and turn them back into oxygen molecules.he ozone layer is essential for complex living organisms (like you and me) to exist. Without the ozone layer, all but very simple life forms would be destroyed by the action of ultraviolet light. Some chemicals, particularly CFCs, destroy ozone in the upper atmosphere.