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.
Ozone is quite the double-edged sword. When found at ground level atmosphere, this gas serves as a dangerous, harmful pollutant. As a molecule in Earth's stratosphere, it protects us by absorbing harmful UV radiation from the sun that causes a variety of health problems in humans, plants, and other animals, as well as damages ecosystems. The ozone layer in the stratosphere is thin but powerful. However, because it occurs in such a low concentration, it's vulnerable to ozone-depleting chemicals, such as CFCs. CFCs are compounds that react with ozone in the presence of UV light by splitting the three oxygen atoms into one O2 molecule and one ClO molecule. The ClO molecule may react with a single oxygen atom, creating more atmospheric oxygen and a single chlorine atom, which is then free to start the cycle anew.