The troposphere is the lowest layer of the atmosphere. It is the part that we breath and where our weather occurs. Blanketing the troposphere is the stratopause, which is where the ozone layer is located.
The most important aspect of the ozone layer pertaining to the biosphere is its absorption of solar ultraviolet radiation before it reaches the earth’s surface. The ultraviolet radiation can be harmful to both animals and plant life. Ozone is sensitive to a number of human and natural activities. Ozone changes will eventually cause serious environmental and global damage.
Chemical compounds, such as, CFCs, nitrous oxides, and bromine are depleting the atmospheric layer of the ozone. From the damage that has already been done to the ozone layer, the results will be around to plague mankind for many years to come. Possibly up to the twenty-second century.
The biosphere must be protected from further excessive contamination where possible.