Final answer:
Crop loss, eye disease, and skin cancer are linked to the depletion of stratospheric ozone, predominantly caused by man-made ozone-depleting substances such as CFCs which release chlorine and bromine gases.
Step-by-step explanation:
The correct option is A:
Crop loss, eye disease, and skin cancer have been attributed to the depletion of stratospheric ozone. This process begins when ozone-depleting substances (ODS), such as CFCs (chlorofluorocarbons), are emitted into the atmosphere and release chlorine and bromine gases when they are exposed to intense ultraviolet (UV) light. These gases are responsible for the breakdown of ozone, which is a critical component in absorbing harmful ultraviolet radiation from the sun.
The presence of stratospheric ozone is essential for life on Earth because it decreases the amount of UV radiation that reaches the surface, thus limiting the frequency of skin cancer and other health effects. However, the introduction of man-made chemicals has accelerated ozone depletion, increasing the risk of adverse health effects for humans, as well as disrupting ecosystems. The implementation of the Montreal Protocol sought to curtail the emission of ODS and has led to a reduction in the level of atmospheric chlorine, aiding in the gradual recovery of the ozone layer.