Final answer:
The loss of the stratospheric ozone layer leads to an increase in UV radiation reaching Earth, which can have negative effects on human health and the environment.
Step-by-step explanation:
One of the most serious results of the loss of the stratospheric ozone layer is the increase in UV radiation reaching Earth. The ozone layer protects us from harmful UV radiation, but when it is depleted, more UV rays reach the surface. This can lead to various negative effects, such as an increase in skin cancers and eye cataracts. It also disrupts the nitrogen cycle, kills plankton, and disrupts ocean food webs.