Why are CFCs bad for the ozone layer?
Then, why has the use of CFCs been phased out?
As previously discussed, CFCs were phased out via the Montreal Protocol due to their part in ozone depletion. However, the atmospheric impacts of CFCs are not limited to their role as ozone depleting chemicals. Infrared absorption bands prevent heat at that wavelength from escaping earth's atmosphere.
Additionally, what does ozone depletion potential or ODP ') measure? The ozone depletion potential (ODP) of a chemical compound is the relative amount of degradation to the ozone layer it can cause, with trichlorofluoromethane (R-11 or CFC-11) being fixed at an ODP of 1.0. It was defined as a measure of destructive effects of a substance compared to a reference substance.
Additionally, why do we need the ozone layer?
Although the concentration of the ozone in the ozone layer is very small, it is vitally important to life because it absorbs biologically harmful ultraviolet (UV) radiation coming from the sun.
How is ozone made in the troposphere?
Ground level or tropospheric ozone is created by chemical reactions between oxides of nitrogen (NOx gases) and volatile organic compounds (VOCs). The combination of these chemicals in the presence of sunlight form ozone. Ozone in the troposphere is considered a greenhouse gas, and may contribute to global warming.