New credit or inquiries from creditors show on your Experian credit report for two years, but only the last year impacts your FICO Score. Sometime opening several credit accounts in a short period of time represents a greater risk to lenders-especially if there isn't also an established credit history on record.
PCBs are mainly broken down either by the effect (direct or indirect) of sunlight or by microorganisms. In general, the persistence of PCB congeners increases with the number of chlorine atoms. Sunlight can play a role in the breakdown of PCBs present in air, water and surface soil. In the atmosphere, PCBs that are present in the atmosphere tend to react with ozone and water under the effect of sunlight.
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.