You are presented with the quiz "The risks of all types of skin cancer increases with increasing" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "ozone depletion results in higher levels of UV radiation reaching Earth" and "if there is an increase in UV radiation, the risks go up for all types of skin cancer". 

So, what's the best answer to the question?


 

       ozone depletion    