Answer:
Towards the end of the 1970's, there has been observed a two ozone layer events which relate to each other.
Step-by-step explanation:
The first observation is the steady decrease in the amount of ozone layer in the earths atmosphere while the second one is an effect to the polar regions of the earth characterized by the reduction of the spring seasons in the stratospheric zone of the ozone layer.
Research has given the results that the main causative agent of the depletion of the ozone layer are human activities. The shift from using organic products to using a lot of chemicals, e.g, bromine and chlorine.
The effect of ozone depletion is that, it causes a number of cancer cells, it leads to aging of the skin, and also causes genetic mutations thereby affecting the current and future generations.
The ozone layer, when healthy, serves the purpose of preventing from harmful U.V rays from the sun.